Eer-moonan

This strange beast is thickset, with elephantine gray skin and stout hind limbs. Its forearms are small and weakly muscled. Its face is tubular, culminating in a snout tipped with a circular mouth ringed with teeth.

Image © Rob Morphy, accessed at Cryptopia here

Taken from the Creature Codex

Eer-moonan are unusual blood-drinking predators of swamps and lakes. Much like a hippopotamus, they are capable of walking along the bottom of waterways as well as swimming. They are intelligent despite their bestial appearance, and have a disturbing fondness for the blood of humanoid prey. Marshes home to a group of eer-moonan often lack humanoid species such as boggards and lizardfolk, and even larger predators steer clear of these prowling monsters. They are ambush predators, making up for their ponderous movements with surprisingly soft footfalls. Eer-moonan never use weapons or armor—their hands lack opposable thumbs, and they are incapable of using tools.

They are highly social creatures. Their groups consist of a few mated pairs, their adult offspring and a few unmated, unrelated individuals that have joined from other pods. They are seemingly capable of forming long-lasting friendships between one another, and the slayer of an eer-moonan may find himself the victim of ever-escalating retribution from its peers.

Eer-moonan young are highly dependent on their parents for several years. They nest in muddy holes on shorelines; the young are left behind while the parents hunt. Upon returning, the parents regurgitate up a bloody feast for their offspring. Eer-moonan can live for up to two centuries if disease and violence do not take their toll, and they reproduce infrequently during their lifetimes. An eer-moonan stands about four feet tall and weighs 150 pounds. 

Eer-Moonan        CR 4
XP 1,200
LE Medium aberration
Init +0; Senses darkvision 60 ft., Perception +9

Defense

AC 17, touch 10, flat-footed 17 (+7 natural)
hp 45 (7d8+14)
Fort +6, Ref +2, Will +6
DR 5/piercing
Defensive Abilities ferocity, stable

Offense

Speed 30 ft.
Melee bite +8 (1d6+4 plus grab)
Special Attacks blood drain (1d3 Con)

Statistics

Str 16, Dex 11, Con 15, Int 6, Wis13, Cha 8
Base Atk +5; CMB +8 (+12 when grappling); CMD 18 (22 vs. bull’s rush and trip)
Feats Great Fortitude, Power Attack, Skill Focus (Stealth)
Skills Perception +9, Stealth +11, Swim +14; Racial Modifiers +4 Swim
Languages Aklo
SQ hold breath

Ecology
Environment temperate marshes and aquatic
Organization solitary, pair or pod (4-12)
Treasure incidental

Special Abilities
Hold Breath (Ex) An eer-moonan can hold its breath for a number of minutes equal to its Constitution score.
Stable (Ex) An eer-moonan gains a +4 bonus on its Combat Maneuver Defense to resist bull’s rush and trip maneuvers when it is standing on the ground.