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Dinosaur, Kronosaurus

This enormous, finned reptile has a long mouth full of sharp teeth and moves through the water with incredible speed.

Kronosaurus CR 10

XP 9,600
N Gargantuan animal
Init +1; Senses low-light vision, scent; Perception +20


AC 23, touch 7, flat-footed 22 (+1 Dex, +16 natural, –4 size)
hp 138 (12d8+84)
Fort +15, Ref +9, Will +7


Speed swim 60 ft.
Melee bite +19 (3d8+19/19–20 plus grab)
Space 20 ft.; Reach 20 ft.
Special Attacks swallow whole (3d6+12 damage, AC 18, 13 hp)


Str 36, Dex 13, Con 24, Int 2, Wis 13, Cha 9
Base Atk +9; CMB +26 (+30 grapple); CMD 37 (can't be tripped)
Feats Endurance, Improved Critical (bite), Iron Will, Power Attack, Skill Focus (Perception), Weapon Focus (bite)
Skills Perception +20, Swim +26

Primeval Sea Creatures

The ocean is full of myriad life forms, as varied and specialized as those in any other environment. But not all sea creatures are the result of millennia upon millennia of continual evolution. Some found themselves perfectly suited for their roles as apex predators millions of years ago and have simply remained as such to the present day, presenting terrible threats to those creatures that cross them, from their natural prey to unsuspecting sailors who find themselves in the wrong place at the wrong time. In most cases, these creatures are closely related to other waterborne animals, be they fish, reptiles, or mammals, and some even have distinctive similarities to primarily land-based creatures.