User blog comment:Lord Loss/Monster Hunter Theory... Blog/@comment-4555457-20120826031513/@comment-5020152-20120831202646

A fish is a fish if it has gills. I'm pretty sure mudskippers have them, even though they do walk around on land most of the time.

By my logic, I wouldn't go that far, because ameobas have only one cell. The farthest I would go is by saying that we're fish, because fish evolved into amphibians which evolved into reptiles which evolved into mammals.