n huge animal 

Perception +19; low-light vision, scent (imprecise) 30 feet

Skills Athletics +23, Stealth +18 (+20 in water), Survival +17

Str +7 Dex +4 Con +7 Int -4 Wis +5 Cha -2

Deep Breath The behemoth hippopotamus can hold its breath for 1 hour.

AC  29; Fort +22, Ref +17, Will +19

HP 190

Speed 35 feet, swim 35 feet

Melee [>] jaws +23 (deadly d12, reach 10 feet), Damage 2d12+10 piercing plus Grab

Melee [>] foot +21, Damage 2d8+9 bludgeoning

Aquatic Ambush [>] 40 feet

Capsize [>] (attack) As hippopotamus (DC 30 for a Huge vessel).

Double Chomp [>] The behemoth hippo makes a jaws Strike targeting two creatures adjacent to each other. Roll the attack and damage once, and apply it to each creature separately.

An Engulfing Chomp counts as two attacks for the multiple attack penalty.

Swallow Whole [>] Medium, 2d12+10 bludgeoning, Rupture 26.

Trample [>>>] Large or smaller, foot, DC 29

Bestiary 2, page 144.