monster Basilosaurus

Orginally posted on Pathfinder SRD

This immense primeval whale has a sleek body that looks more serpentine than mammal, and jaws filled with sharp teeth.

Basilosaurus CR 12
XP 19,200

N Gargantuan animal
Init +5;
Senses Blindsense 60 ft., Low-Light Vision; Perception +25
AC 27, touch 7, flat-footed 26 (+1 Dexterity, +20 natural, -4 size)

hp 161 (17d8+85)

Fort +17, Ref +11, Will +7
Speed Swim 40 ft.

Melee bite +23 (4d6+15/19-20 plus grab), tail slap +18 (2d8+7)

Space 20 ft.; Reach 20 ft.

Special Attacks swallow whole (4d6+15 bludgeoning damage, AC 20, 16 hp)
Strength 41, Dexterity 12,
Constitution 21, Intelligence 2, Wisdom 11, Charisma 6

Base Atk +12; CMB +31; CMD 42

Feats Diehard, Endurance, Great Fortitude, Improved critical (bite), Improved Initiative, Iron Will, Power
, Skill Focus (Perception), Vital

Skills Perception +25, Swim +31; Racial Modifiers +4 Perception
SQ hold breath
Environment any oceans

Organization solitary, pair, or pod (3-10)
Treasure none
Basilosaurus.Date Source Pavel Riha
Basilosaurus.Date Source Pavel Riha

Despite their saurian name, basilosauruses are in fact oceanic mammals, and at 60 feet in length  are highly formidable beasts of the sea. In appearance, they resemble greatly elongated whales, but with long, toothed jaws resembling an alligator’s. Inexperienced  observers often confuse a basilosaurus with a sea serpent or water orm’ and in all fairness, in the aftermath of a basilosaurus attack on an unsuspecting  ship, such distinctions are largely academic anyway.

A basilosaurus relies as much on vision as echolocation to find prey, but sometimes mistakes smaller ships for food. Basilosauruses have few natural predators; only supernatural monsters like krakens, thalassic behemoths, and the largest of sea serpents can truly threaten a fully grown one.