About Cassie

Gender: Female
Current Tag Id:

Cassie, a female orphaned calf rescued from the Tomoka River in Ormond Beach, Volusia County, was brought in on August 26, 2015. At the time she was 117 centimeters long and weighed 66 pounds. She recovered at SeaWorld and later was transferred to the Jacksonville Zoo, and was released at Blue Spring State Park on March 8, 2018. She has now grown to 890 pounds and 260 centimeters long. She will be monitored by Sea To Shore Alliance.

  1. 04/08/2020 06:00 PM
    • Cassie was discovered near Blue Spring State Park, deceased. Her body showed signs of a recent boatstrike, however her cause of death could not be confirmed because of Government restrictions due to the Covid- 19 pandemic. We will cherish the memories of Cassie and be thankful for all that we were able to learn from her while she was with us.

  2. 03/08/2019 10:45 AM
    • Cassie was bottom resting when approached for an in water assessment of her overall body condition. She was still lean on the sides but very happy to see she gained extensive gut girth. With this great body condition improvement and a one year period since her release last year, her gear was removed and she is considered a success.
  3. 03/04/2019 08:50 AM
    • Cassie was initially seen traveling up the St. John’s River then reversed direction. She was observed deep diving while crossing the river and when boats were in close range. She found a sheltered area out of the wind and began bottom resting till the end of the observation
  4. 02/28/2019 11:25 AM
    • Cassie was milling under a community dock in the St. John’s River. She was periodically resting but the wake from passing boats would cause her to keep adjusting locations. She traveled south for a short time then returned again finding a sheltered spot where she could take an uninterrupted rest.
  5. 02/25/2019 01:45 PM
    • Cassie was first seen milling near a private dock in the St. John’s River, and in some vegetation. Another manatee came by, they interacted briefly and Cassie followed it to a sheltered spot where they both began feeding. Cassie could be seen combing Duckweed off the surface and possibly Pennywort. She continued eating here with the other manatee for the remainder of the observation.
  6. 02/22/2019 12:30 PM
    • Cassie was resting close to a private dock in the St. John’s River, for the entire observation. This area had a lot of boat traffic and higher speed zones so it was good to see Cassie staying close to the river’s edge in about four feet of water. While resting her respirations averaged every 15 minutes and gas was observed twice.
  7. 02/12/2019 11:00 PM
    • An in water assessment showed Cassie had good body condition. Her belly was flat with slight rounding in the lower abdomen. Her head, shoulders, and peduncle areas all looked good. She produced fecal that looked of normal consistency
  8. 02/06/2019 04:49 PM
    • Cassie has been going out regularly to feed and is maintaining a good body condition
  9. 02/01/2019 04:45 PM
    • Cassie has been heading out every day to feed. Earlier she seemed to lose a little body condition but her current feeding activity has reversed her decline in condition and she is looking better
  10. 01/14/2019 10:45 AM
    • Cassie was resting with Buckeye near the swimming deck. She would occasionally move a little down the run then rest again. She did this until she was almost at the end of the run, then a large group of manatees came into the run and she settled in among them and rested for the duration of the observation.
  11. 01/07/2019 04:26 PM

      12/26/2018 9:00am

      Cassie was resting next to Buckeye. At one point another manatee began to interact with her tag. She interacted with that animal briefly then moved across the river to rest again. Her respirations were on an average every 5 min.



      12/12/2018 9:40am

      Cassie traveled into Blue Spring around 8:45 and eventually settled down to rest at the spring boil.  Her tag was exchanged and her overall body condition appeared to have decreased since last observed approximately a month ago.  Photos were obtained and an additional winter assessment will be conducted in a month.



      11/29/2018 12:00pm

      Cassie was bottom resting in the spring run. Occasionally another animal would start to interact with her tag and disrupt her. She would mill around until finding another area to rest. This pattern repeated itself for the duration of the observation. At one point she did a slow barrel roll and her body condition looked good.



      11/19/2018 1:15pm


      Found Cassie feeding on vegetation along the bank right before she dove deep under our boat crossing to the other side. She traveled into Blue Spring and met up with one of our past rehab manatees; Annie, Annie’s calf, and two other manatees. A tag exchange was initiated after she spun around twice to see the researcher. During most of the tag exchange, Cassie was rubbing her tail on the top of a fallen log. Her body condition looked great. 




      11/13/2018 3:00pm

      Cassie was underneath a large mat of vegetation by the bank of the river, completely out of sight. From the way the vegetation was moving it appeared that she was feeding. She would come out briefly then go back in for more. After about 20 minutes, she began to rest until the end of the observation.




      11/7/2018 8:45

      Cassie was passing in front of the launch, heading to the spring run. She abruptly changed course and headed towards the lagoon. About midway into the lagoon, she met up with Buckeye and they socialized briefly with a third manatee. All of them moved to a shallow area, where it appeared they were feeding on something on the bottom. Cassie then rested for the remainder of the observation



      11/2/2018 9:15am

      Cassie was heading into the river from the spring run, passing under the kayak without any investigation or interaction. She milled around the tour boat launch before following another manatee towards the lagoon. She stopped at a mat of vegetation and it looked like she was going to feed. A pair of kayakers approached, spooked another manatee in the same area, causing Cassie to move away. She milled around the kayak launch briefly then followed another manatee towards the lagoon where she found a place on the shore to tuck in out of the wind and rest.



      10/25/2018 11:00am

      Cassie was eating water lettuce in the river, moving from one patch to another along the river. She moved away when an airboat approached but then moved back to continue feeding. She investigated the kayak but did not interact before moving away.



      10/16/2018 8:45am

      Cassie was resting under a large vegetation patch. She would come out from under it, take a breath and then go back in. She did this for over an hour before making her way up into the spring run. She interacted with another small manatee, then milled around until the end of the observation. There were swimmers in the area but Cassie did not approach any of them.


  12. 01/07/2019 09:15 AM
    • Cassie was resting near the Boil, taking breaths about every 10 minutes .She continued to rest for an hour and a half, slightly adjusting her position once in a while. She started to mill down the river, pausing on the sunny side every now and then. She would nose around the bank for a little bit then continue to meander down the run.
  13. 09/04/2018 09:35 AM
    • Cassie socialized with one other animal just inside the entrance to the spring this morning. Buckeye was feeding nearby. Cassie eventually made her way into the swimming area and went to sleep under the stairs, showing no interest in the few swimmers who turned out today.

  14. 08/31/2018 09:00 AM
    • Cassie socialized in the boil with Buckeye and one other adult.  There were 10-12 swimmers there but none of the group paid any attention.  Buckeye left after about 2 hours, and the other adult left a little later.  Cassie went to her corner and napped until early afternoon, then milled down the run and fed on water hyacinth and gator weed instead of her usual pennywort and water lettuce.

  15. 08/27/2018 01:00 PM
    • Cassie was at Blue Spring resting in the boil area with Buckeye and one other adult today. Her entire set of equipment had broken off sometime during the previous night, but we were able to re-attach them today after she woke up and began socializing, and now she has a full set of tracking gear again.

  16. 08/24/2018 09:52 AM
    • This morning Cassie, Buckeye, Annie and her calf, 2 juveniles, and the pregnant female Mata Hari were all between the diver entry and the boil at Blue Spring, positioned quietly on bottom near each other.  There were only a few swimmers in the area.  Cassie and Buckeye were milling around together but not interacting with swimmers. Cassie went to the corner for a nap and Buckeye milled to the south bank of the boil near the entrance.

  17. 08/22/2018 01:57 PM
    • Cassie fed on water lettuce, pennywort, and duck weed in the large patches of vegetation near the entrance of Blue Spring.
  18. 08/19/2018 06:43 AM
    • Cassie was feeding near one other animal this morning. She was enjoying the water lettuce in the oxbow just north of the spring. She began to slowly mill south, still feeding at times as she went. She eventually traveled past the entrance to the spring and headed towards the lagoon.
  19. 08/14/2018 12:40 PM
    • Cassie was being social with Annie and her calf at Blue Spring before leaving to go out into the river, going north.
  20. 08/12/2018 01:53 PM
    • Cassie fed near the entrance to Blue Spring across from the observation platforms. There are still large patches of fresh pennywort, water lettuce, and duck weed there. No other animals were seen.
  21. 08/06/2018 01:00 PM
    • Cassie bottom-rested midway down the spring run, then milled out to the river and went north, staying on the west bank.
  22. 08/02/2018 01:50 PM
    • Cassie was nibbling on algae by herself within the run at Blue Spring, then made her way out and met up with another animal across from the observation platforms, socializing and following each other. They headed out into the river and fed on patches of vegetation along the bank.
  23. 07/27/2018 09:23 AM
    • Cassie was seen by herself near the stairs at divers’ entry in Blue Spring.  She bottom-rested there for nearly 3 hours, with respiration rates of 9-10 minutes.  She then swam south toward the swim platform.

  24. 07/24/2018 08:40 AM
    • Cassie and Buckeye were both in the observation area of the spring for awhile, socializing and feeding across from the observation decks, then went to the canoe beach area. Cassie ended up leaving and headed towards the lagoon, while Buckeye rested and then followed her about 35 minutes later.

  25. 07/19/2018 09:00 AM
    • Cassie and Buckeye met up at Blue Spring and stayed together quite a bit for several hours into the afternoon, very social and tactile with each other, staying mostly in the boil.

  26. 07/10/2018 10:59 AM
    • Cassie and Buckeye have stayed in Lake Beresford for the past two days, but were milling down the river back toward the spring area.

  27. 07/07/2018 09:42 AM
    • It was nice to see Cassie venturing north today, to the south end of Lake Beresford, which was the location Buckeye was seen a week ago where there is plenty of vegetation including favorites like pennywort, gator weed, and water lettuce. She was milling by herself, then traveled southbound heading in the direction of Blue Spring. She stayed out of the channel for most of the trip, crossing over once about half way down. In late morning we reached the oxbow across from French Landing. She entered the oxbow and milled around there for the rest of the visual.

  28. 07/01/2018 09:25 AM
    • Cassie and 2 other animals were around Blue Spring today. Cassie went up and down the run several times along with them, eventually following them out to the entrance.

  29. 06/18/2018 10:23 AM
    • Cassie was in the Blue Spring area, heading out to the observation platform to hang out at the patches of vegetation, possibly feeding. She was the only manatee in the spring.

  30. 06/11/2018 08:30 AM
    • Cassie and Buckeye were west of the boil at the spring, closer to divers’ entry, and moving toward the boil.  While there, both stayed in the deeper parts and did not approach swimmers who were again cooperative, fortunately.  Again they didn’t stay together the whole time, and by mid-morning Cassie went out to the river, halfway to French Landing.  She came back to the run and across from the first overlook met up with Buckeye, Phyllis and her 2 calves, and one other adult, and all fed enthusiastically on the mats of pennywort and gator weed there.

  31. 06/10/2018 08:20 AM
    • Early in the morning both Cassie and Buckeye were at the boil of the spring.  There ended up being a lot of swimmers, but very soon both went to the back corner and settled down to chew algae off a log for nearly an hour, then went to sleep.  After waking, both Cassie and Buckeye made 2-3 trips back and forth between just west of divers’ entry and the boil as if they couldn’t decide what to do.  They weren’t always together.  While in transit they didn’t approach people, just swam past them.  Cassie would stop at logs and scratch her back and tail.  By early afternoon they were past the swim area to the 2nd overlook and socializing with Phyllis and her 2 calves and one other adult.

  32. 06/09/2018 09:29 AM
    • Cassie was milling around the Blue Spring boat dock with Buckeye nearby. She hung around for several minutes before entering the spring and socializing with another animal, staying near the entrance. Several boats passed slowly within 50 ft and she did not react. Later in the morning Cassie and friend traveled slightly south, socializing. Gas was observed from Cassie twice during this visual. Respiration rates were 4-6 minutes.

  33. 06/06/2018 12:38 PM
    • Cassie and Buckeye were loosely associated in the same group with at least 3 other animals, socializing, before she moved off toward the west bank.  She hung out on that side for a while, but when Buckeye began feeding on pennywort she milled right in his direction.  She joined up with him but unfortunately didn't start feeding like it looked like she would.  From tag movements it looked like she was disturbed by the other members of their group and she and Buckeye traveled off together, then settled down next to each other.

  34. 06/05/2018 12:38 PM
    • Cassie and Buckeye were loosely associated in the same group to the south of Blue Spring, socializing, before she moved off toward the west bank.  She hung out on that side for a while, but when Buckeye began feeding on pennywort she milled right in his direction.  She joined up with him but didn't start feeding, and may have been disturbed by the other members of their group and she and Buckeye traveled off together, then settled down next to each other.

  35. 06/01/2018 12:51 PM
    • Cassie socialized south of Blue Spring in a group with Buckeye and 3 other smaller adults, then stayed to the sidelines of the more active socializing with one other animal. Buckeye joined the two of them. There were at least 8-10 animals total in the area and one mother-calf pair.

  36. 05/29/2018 04:19 PM
    • At first Cassie couldn't quite decide what she wanted to do.  Milling around near the entrance to Blue Spring, she started to travel under the river cruise boat toward the entrance to the spring run, then circled back as a storm started coming in and went south.  She continued traveling in and down to the southeast corner of the area where Buckeye and a group of 4 others were socializing.  Cassie didn't stay with the group the entire time, socializing on and off and sometimes milling.

  37. 05/22/2018 04:25 PM
    • Cassie was seen south of Blue Spring, socializing actively which included nuzzling.  Her respirations were 3-4 minutes apart and she was within a group of 5 others which of course included Buckeye.

  38. 05/20/2018 07:55 AM
    • When I arrived at Blue Spring this morning, Cassie had managed to tangle her belt in the buoy line south of the spring entrance. I was able to unfasten the cable from the dock and get her released within 3-4 minutes. She swam away in the direction of Buckeye who was 20 yards south of the boat dock near the shoreline. Respiration rates went back to normal, and she located Buckeye and they traveled together into the lagoon. They eventually stopped and both animals bottom rested for the rest of the visual. Her respiration rates extended to 8 minutes.  I did manage to get a visual of her ventral side, which was flat and there were no visible folds.

  39. 05/10/2018 10:40 AM
    • Cassie was in a group of 7 in the lagoon which of course included Buckeye. When I first sighted them in the lagoon they had a group of kayakers (with a guide) very close to them, but they backed away after it was requested.  Cassie, Buckeye, and a few others from the group started to approach my boat but I backed up and they didn't continue to approach.  When Buckeye got involved in a mating herd, Cassie stayed close to the group and was initially socializing with a few animals but not part of the mating, and eventually went to sleep nearby. There is a great deal of pennywort and other vegetation available here.

  40. 05/06/2018 10:04 AM
    • Cassie was with Buckeye and one other animal just south of Blue Spring. It was raining when I arrived and all three animals were asleep. All three animals were still sleeping when I departed.  Cassie had respiration rates in the 9-11 minute range.

  41. 05/02/2018 07:12 AM
    • Cassie milled slowly out of Blue Spring and to the south.  When another animal moved into the area and had Buckeye's attention, she moved out into the river to be part of the gathering.  She did approach me after socializing with the other animals but did not touch me, just kept milling by.  Once I started her tag exchange, she changed her tune and approached me, but then moved away and did not approach again.  She milled back and forth under kayaks but only because the kayakers were still learning kayak skills, not that she was approaching them.  But when a boat moved into the area and beached to go into the park, Cassie moved to their stern and stared at them until they got off the boat.  She then continued her adventures south of the spring with Buckeye in tow.

  42. 04/28/2018 10:14 AM
    • I managed to catch Cassie outside of the spring today. She was with 4 other animals just to the south. It was no surprise that one of them was Buckeye. Cassie milled around briefly before socializing. There was a short period of cavorting, but she seemed uninterested in taking it to that level and quickly removed herself from the rough housing. Respirations were 4-5 minutes apart.

  43. 04/22/2018 09:13 AM
    • Both Cassie and Buckeye were at the boil at Blue Spring, but showed no interest in swimmers and when it got busy they seemed bothered. Late in the morning they both left the spring and traveled south. Buckeye passed a lot of gas while in the boil, and there was a fecal sample there that could have been from one of them.

  44. 04/17/2018 11:36 AM
    • Swimming stayed closed today until around noon. Cassie and Buckeye headed up towards diver entry and the boil between 9:30 and noon. Once at the boil they were busier socializing with each other, then settled down to rest while the people kept a respectful distance. Some people were free diving, but neither Cassie nor Buckeye showed interest. Both manatees left between 3 and 4.

  45. 04/16/2018 09:33 AM
    • Cassie was located on the northwest corner of the spring just outside of the buoy line.  She seemed content to be outside of the buoy line but after Buckeye bolted into spring, Cassie followed behind him and another manatee.  Cassie kept close to another animal and all began to bottom rest once they reached the east side of the swim dock.  Cassie was very close to other manatee...obviously trying to make Buckeye jealous. It turned out I was not just there to change out a tag, but to retag--she had lost her tag again.  I entered the water and she left diver’s entry to go up to the boil.  After stalking her behind logs, she saw me and approached within two feet but did not touch me, then slowly moved away.  I continued to stalk in which she responded by spinning to look at me on two more occasions before she finally took a breath, allowing me to retag her.

  46. 04/14/2018 03:32 PM
    • Swimmers at Blue Spring respectfully avoided Cassie and Buckeye as they milled through the swim area. They went out into the river together at 3:45, then continued south.

  47. 04/08/2018 10:15 AM
    • When I first arrived I found Cassie near the boil of the spring with Buckeye. The park staff was kind enough to shut down the section of the spring around the boil, which allowed a visual minus human distraction. Cassie milled briefly before settling down for a short nap. She awoke and immediately traveled towards the river. When I left she was slowly milling about with Buckeye by her side near the entrance to the lagoon.  Respiration rates were 3-10 minutes.

  48. 03/30/2018 09:29 AM
    • Cassie, Buckeye, and the cold stressed manatee that FWC was monitoring prior to rescue were at Blue Spring. Cassie and Buckeye swam into the spring from the south side of the river. They stayed close to the buoy line and swam around slowly with the other animal. Eventually they hung out quietly at the canoe beach, then went on to rest further up the run, between platfoms 1 and 2.

  49. 03/27/2018 09:55 AM
    • Cassie stayed near Buckeye on bottom with regular respirations for about 10 minutes before milling upstream towards the second and third observation platforms of Blue Spring, then settled back down on bottom there. There were 15 other animals in the run, near the river.

  50. 03/18/2018 08:17 AM
    • Cassie was bottom-resting at the boil at Blue Spring, then joined Buckeye who was milling nearby. They occasionally settled on bottom together, then milled in a stop and start way.

  51. 03/12/2018 03:00 PM
    • Cassie was with Buckeye in the spring run, but traveling towards the river together. They explored a bit north of the spring, then south, but didn't quite travel all the way up into the lagoon. They sometimes came up for breaths together. Other manatees were observed leaving the spring run as well during that time.

  52. 03/11/2018 09:15 AM
    • This time it was Cassie’s turn to lose her tag, snagging it under a branch midway down the spring run. She was traveling and milling around the entrance to the spring, and allowed herself to be re-tagged when she got distracted socializing in a group.

  53. 03/10/2018 07:45 AM
    • Buckeye had lost his tag and we responded to re-tag him at Blue Spring. While the re-tagging was going on Cassie socialized mid-water column somewhat near Buckeye in a group of about 30 others, then wandered down past the second platform.

Data map is currently not present for Cassie.