Stuck Fish
 

Running MA3, Beta2
Total info on the screen is:
17 FPS (1680x1050x32) #0 Beta2
HAL (sw vp): NVIDIA Quadro NVS with AGP8X
Timing Clamp 0.10, Sleep(10) Window Size 1680x1050

On the right size of the aquarium near the green looking coral and the anemi looking coral (the pinkish kinda color) I have a gish stuck in the background.
The exact location is to the right of the green coral, if you follow the horizontal line of the green coral, there is a purple section. In the Purple section there is a small spot where you can view another layer of coral and I have a fish stuck there. I gave it 15+ mins and the fish never got out, but I could always see it moving. I believe it was the Koran Angelfish that was stuck.

Let me know what other detail you may need.

LOL, I just exited the program and tried it again, and this time there is an orange and yellow fish stuck back there.

If you could provide a screen capture, it would be helpful.