Your body sprouts fishlike fins. A fin might begin on the top of your head and go all the way down your spine. Others might appear on your forearms or calves, or they might sprout from your shoulders or ears. The fins confer no special abilities.
Modern System Reference Document © 2002, Wizards of the Coast, Inc.; Authors Bill Slavicsek, Jeff Grubb, Rich Redman, Charles Ryan, based on material by Jonathan Tweet, Monte Cook, Skip Williams, Richard Baker,Peter Adkison, Bruce R. Cordell, John Tynes, Andy Collins, and JD Wiker.