Amphibious Form Feat 2
Source Pathfinder Secrets of Magic
Your eidolon adapts to life on land and underwater. It gains the amphibious trait, allowing it to breathe in water and air and to avoid the normal -2 penalty for making bludgeoning and slashing unarmed Strikes underwater. It gains a swim Speed equal to its land Speed or 25 feet, whichever is less; or if it is normally aquatic, it gains a land Speed equal to its swim Speed or 25 feet, whichever is less.
Traits
Anything that doesn't list another rarity trait (uncommon, rare, or unique) automatically has the common trait. This rarity indicates that an ability, item, or spell is available to all players who meet the prerequisites for it. A creature of this rarity is generally known and can be summoned with the appropriate summon spell.
SummonerThis indicates abilities from the Summoner class.