
It does look like a Babel fish, but the plug bit is rather large.
Maybe I'm a bit old - ekimp, I was trying to be funny and referring to an ancient riddle.
Why do elephants have Big Ears? Because Noddy wouldn't pay the ransom.
I didn't mean to be personal at all.

Trying to be sensible now;
Could it be for bath salts? Fish are often appropriate for bathroom decor.