Sea Serpent
Colossal Animal
HD 33d8+165; hp 343;
Init +7; Swim 20, Climb 20;
AC:19 (Flatfooted:16 Touch:5);
Atk Bite +31 melee (4d6+22/19-20);
SA: Improved Grab (Ex) , Constrict (Ex)
SQ: Amphibious, Scent (Ex), Low-light Vision (Ex);
AL N;
SV Fort +23, Ref +21, Will +12;
STR 41, DEX 17, CON 21, INT 1, WIS 12, CHA 2.
Skills: Balance +11, Climb +23, Hide -6, Listen +20, Spot +20, Swim +26*.
Feats: Armor Skin, Awesome Blow, Combat Reflexes, Death Blow, Epic Toughness, Improved Bull Rush, Improved Critical: Bite, Improved Initiative, Improved Natural Attack: Bite, Improved Sunder, Power Attack, Track.
Special Attacks: Improved Grab (Ex): To use this ability, the giant constrictor must hit with its bite attack. If it gets a hold, it can constrict.
Constrict (Ex): A giant constrictor snake deals 4d6+15 points of damage with a successful grapple check against Gargantuan or smaller creatures.
The sea serpent can use its Improved Sunder feat in conjunction with its Constrict ability to squeeze Gargantuan or smaller vessels. If attacking a vessel, the sea serpent will probably use Power Attack, reducing its attack bonus by 10 and increasing its damage by +20.
The sea serpent is fond of using its Awesome Blow feat to send smaller vessels flying, like rowboats.
* (Insert obligatory "+8 to Swim" text)