n huge animal 

Perception +17; low-light vision

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

Str +7 Dex +3 Con +5 Int -5 Wis +2 Cha -4

AC  26; Fort +20, Ref +16, Will +15

HP 175

Speed 30 feet, swim 40 feet

Melee [>] jaws +22 (reach 15 feet), Damage 2d10+13 piercing plus Grab

Melee [>] tail +20 (agile, reach 15 feet), Damage 1d10+11 bludgeoning

Aquatic Ambush [>] 50 feet

Deep Breath A deinosuchus can hold its breath for about 2 hours.

Swallow Whole [>] (attack) Large, 2d8+7 bludgeoning, Rupture 18.

Bestiary, page 67.