Is it possible constructing a little robot car,
so that a standard fish can control where there is going his Fishbowl?
If you include one or two arms to get some food
and some speakers for talking or making strange noise
or even an aparature for painting
it could actually immitate intelligent action.
My design would be the aquarium closed,
with communication-hatches that fill with water
like an air-hatch between two moon-cars who can build
a TOOL-KAR/arm if they lock together…
so that the fish can visit eachother