Check out the Pupfish

[phastroh]

It eats Algae and Detritus - it is more complicated than that but it would be good to keep the tank clean but of course you could never have one since it eats scales.

I don't know read the article.

Fastest Evolution Clocked in Tiny Fish - FoxNews.com

 

[little_fish]

Interesting

 

[Bifferwine]

It looks like it's a brackish fish, huh? I didn't see anything about it living in an ocean. Just salty lakes.

 

[AmberSunrise]

Yeah I would say thats brackish also. It looks like my betta fish in the face without any showy fins.

Neat though