Below is a list of feats available to the Reef Giant heritage of the Giant race.
Avalanche Stopper (Race)
Prerequisite: Giant(Any), Boulder Toss
Benefit: You gain the Rock Catching universal ability.
Special: If you have the Deflect Arrows (Combat) feat you may use it to attempt to deflect or catch any unattended object that makes an attack roll against you, not just attacks from ranged weapons.
Boulder Toss (Race)
Prerequisite: Giant(Any)
Benefit: You gain the Rock Throwing universal ability, allowing you to throw rocks of up to two size categories smaller than yourself (dealing 2d6 bludgeoning damage for a small object).
Cave Giant (Race)
Prerequisite: Giant(Any)
Benefit: You gain Darkvision (60 feet).
Special: You may select this feat a second time, improving the range of your darkvision to 90 feet.
Child of the Deep (Race)
Prerequisite: Giant(Reef)
Benefit: You gain the Amphibious universal ability.
Deep Sea Hunter (Race)
Prerequisite: Giant(Reef), Child of the Deep
Benefit: You gain the Scent universal ability while in the water.
Powerful Strokes (Race)
Prerequisite: Giant(Reef)
Benefit: Gain a swim speed equal to your base land speed (along with the +8 racial bonus on Athletics checks to swimming a swim speed grants).
Thicker Skin (Race)
Prerequisite: Giant(Any)
Benefit: You gain a +1 natural armor bonus, or improve your existing natural armor bonus by an additional +1.
Special: You may take this feat multiple times, but not more than once per 5 hit dice.