Nation A parasite feasts on a fish’s tongue until it’s gone. Don’t worry, humans can’t get it. August 15, 2020August 15, 2020Joshua Bote, USA TODAYComments Off on A parasite feasts on a fish’s tongue until it’s gone. Don’t worry, humans can’t get it. When it latches itself onto the fish's tongue, it feeds on the tongue's blood vessels until it replaces the tongue. But it's nothing to worry about.