From Pathfinder #170: Spoken on the Song Wind, which isn't enabled.

Old Thrasher

CREATURE 8

UNIQUE LARGE ANIMAL

Perception +16; low-light vision

Skills Athletics +18, Stealth +16 (+20 in water)

Str +6, Dex +2, Con +4, Int -5, Wis +3, Cha -2

AC 26; Fort +18, Ref +16, Will +15

HP 140

Speed 20 feet, swim 25 feet

Melee Jaws +20 (unarmed), Damage 2d10+8 piercing plus Grab

Melee Tail +20 (agile, reach 10), Damage 2d6+8 bludgeoning

Death Roll (attack)

Requirements Old Thrasher must have a creature Grabbed

Effect Old Thrasher tucks its legs and rolls rapidly, twisting its victim. It makes a jaws Strike with a +2 circumstance bonus to the attack roll against the grabbed creature. If it hits, it also knocks the creature Prone. If it fails, it releases the creature.

Deep Breath

Old Thrasher can hold its breath for about 4 hours.

Into the Deep

Requirements Old Thrasher must have a creature grabbed

Effect Old Thrasher Swims, bringing its victim along with it.

Thunderous Tail

Old Thrasher makes up to three tail Strikes against different targets. Any target hit must succeed at a Fortitude (success) (Fortitude (critical success)) save or be knocked Prone.

Grab

Requirements The monster's last action was a successful Strike that lists Grab in its damage entry, or the monster has a creature Grabbed or Restrained

Effect If used after a Strike, the monster attempts to Grapple the creature using the body part it attacked with. This attempt neither applies nor counts toward the creature's multiple attack penalty.

The monster can instead use Grab and choose one creature it's grabbing or restraining with an appendage that has Grab to automatically extend that condition to the end of the monster's next turn.

Pathfinder #170: Spoken on the Song WindOGL