Feat: Amphibious Form

Your eidolon adapts to life on land and underwater. They gain the amphibious trait, allowing them to breathe in water and air and to avoid the normal –2 penalty for making bludgeoning and slashing unarmed Strikes underwater. They gain a swim Speed equal to their land Speed or 25 feet, whichever is less; if they're normally aquatic, they gain a land Speed equal to their swim Speed or 25 feet, whichever is less.