Some may doubt evolution but I've seen it in action. I've made my way back up to Flippery Fish in the TTLB Ecosystem.
I'd like to think of myself as a mummichog (with the unfortunate scientific name of Fundulus heteroclitus - don't laugh at me!) simply because you can't kill those things with a stick. (Ok, maybe with a stick.) When my husband was doing research on the Eastern Shore one of the researchers put a mummichog in his damp pocket and the little sucker survived a trek through a marsh and a 15 mile car ride before being put in a tank.
We have a 'chog at home now that we adopted from the lab. She's a voracious little thing that eats more than our monster goldfish. Don't worry, they aren't in the same tank.
(No animals were harmed in the creation of this post.)