Depends on whether you count the manifestations of a messiah as constituting one person or a multiplicity ~ the Krishna devotees have certainly latched on to Krishna being the same as the Great Fish who used the 8 headed cobra to rescue Ma-Nu from the Great Flood on Mt. Ararat ~ so obviously there he’s not a snake ~ still, you see the symbol on a bumper sticker you know the devotee in the car is intending the Krishna persona and not some other. ~ Right?
what symbol? There is a story of Krishna capturing a fish and releasing it (can’t remember the entire story) but not of Krishna being a fish.