Improved Grab (Ex): To use this ability, the dire shark must
hit with its bite attack. If it gets a hold, it can try to
swallow the foe.
Swallow Whole (Ex): A dire shark can try to swallow a grabbed
opponent of Large or smaller size by making a successful grapple
check. Once inside, the opponent takes 2d6+6 points of crushing
damage plus 1d8+4 points of acid damage per round from the
shark's digestive juices. A swallowed creature can cut its
way out using claws or a light slashing weapon by dealing 25
points of damage to the shark's digestive tract (AC 20).
Once the creature exits, muscular action closes the hole; another
swallowed opponent must cut its own way out. The shark's
gullet can hold two Large, four Small, eight Tiny, sixteen
Diminutive, or thirty-two Fine or smaller opponents.
Keen Scent (Ex): A dire shark can notice creatures by scent in
a 180-foot radius and detect blood in the water at ranges of up
to a mile.