Gills

GILLS
Type: P Action: Auto
Range: Self Duration: Always

The critter can breathe underwater, meaning the critter can breathe salt or freshwater (depending on their habitat—they can’t breathe both) but not air. If they are not underwater, the critter can function for about five minutes until they are left doing nothing but struggle for oxygen. From there, it is not long until death if they don’t get back underwater.

(p192 HS)