+2 STR, +1 DEX, Natural Armor 12+DEX, Proficiency in Athletics and Perception, Advantage on saves vs charmed, frightened, paralyzed, poisoned, stunned, or put to sleep, must be submerged every 4 hours or you suffocate (eeep!), 30 ft walk/swim.
Suffocating after 4 hours on land is pretty...