and who says you can not teach a fish new tricks. Here is a kit you can use to teach some awesome tricks (via thinkgeek.com)

Apparently you can actually train fish to do things. Although it's not quite as useful as fetching your slippers... unless you have some crazy Dr. Seuss fish who warns you about the Cat in the Hat... in which case you only have to train him to shut his mouth!

This is so cool!!
How awesome would it be to train your fish to do tricks...
The R2 Fish Training School Kit is a complete training system that includes everything you need to teach your fish over 10 amazing tricks (including soccer, football, basketball, limbo, fetch, tunnels, and more!)

Physical education for your fishies!

this so awsome!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!^_^ *_*