Cecaelia

In place of legs, this handsome humanoid sports an octopus's eight writhing tentacles.

Cecaelia CR 5

XP 1,600
CN Medium monstrous humanoid (aquatic)
Init +4; Senses darkvision 60 ft., tentacle sense 10 ft.; Perception +1

DEFENSE

AC 18, touch 14, flat-footed 14 (+4 Dex, +4 natural)
hp 45 (6d10+12)
Fort +4, Ref +9, Will +6

OFFENSE

Speed 30 ft., swim 40 ft., jet 200 ft.
Melee mwk spear +11/+6 (1d8+4/x3), 2 tentacles +5 (1d4+1 plus grab)
Ranged mwk spear +12 (1d8+3/x3)
Space 5 ft.; Reach 5 ft. (10 ft. with tentacles)

STATISTICS

Str 16, Dex 19, Con 14, Int 9, Wis 12, Cha 11
Base Atk +6; CMB +9 (+13 grapple); CMD 23 (can't be tripped)
Feats Combat Reflexes, Weapon Focus (spear), Weapon Focus (tentacles)
Skills* Stealth +13, Survival +10, Swim +12
Languages Aquan, Common
SQ amphibious

SPECIAL ABILITIES

Ink Cloud (Ex)

Once per hour as a standard action, a cecaelia can emit a 10-foot-radius sphere of ink while underwater. This ink cloud provides total concealment and persists for 1 minute.

Tentacle Sense (Ex)

As a swift action while swimming and while it is not grappled or grappling, the cecaelia can spread its tentacles wide to form a sensory net around it. This grants blindsight to a range of 10 feet and lasts as long as the cecaelia concentrates. While this effect lasts, the creature cannot attack with its tentacles or move.

Editor's Note
The creature seems to be missing it's +8 to Swim from having a swim speed. Corrected Skills line below.

Skills Stealth +13, Survival +10, Swim +20