My favorite animals are always the sea otters. They're just so damn adorable that I could watch them the whole day. Here they feed them shellfish that is frozen in ice cubes and rings.
Um... excuse me... it appears someone installed your jelly fish tank upside down.
No worries I'll just flip the picture around.
I've seen puffer fish in private aquariums.
They are a cool looking fish but I think I'd only want to own one if I could train it to do this on command.