Aegipan

Swimming through the water is a creature with the head and torso of a furred humanoid and the scaled tail of a great fish. Although its features are brutish and long, curved horns grow from its head, the thing bears a kindly expression.

Taken from Creature Codex

Wherever the shore and the sea meet, the native humanoids of those disparate domains come into conflict.  Aegipans are selfless fey creatures that devote their lives to defusing such rivalries, seeking to negotiate treaties and trade accords between aquatic humanoids and their land-lubbing counterparts. In so doing, they hope to minimize the exploitation of oceanic resources and stop unnecessary bloodshed.

In aquatic societies, aegipans typically travel undisguised, but they use their shapechanging abilities to take human form on land—in part to conceal their alien natures, and in part to gain the use of convenient legs. Other common aegipan activities include freeing bycatch from fishing nets, protecting beaches used as nesting sites by sea birds and turtles, and even saving swimmers from drowning. Many reports of friendly dolphins guiding lost sailors or helping a child fallen overboard are in fact due to aegipan intervention.

An aegipan grows seven feet long and weighs 200 pounds. Although they disparage violence, they fight fiercely against wicked men or to protect a beloved charge. Such is their devotion that an aegipan would gladly sacrifice its life to save a deserving soul.

Aegipan               CR 3
XP 800
NG Medium fey (aquatic)
Init +1; Senses low-light vision, Perception +10
Defense
AC 14, touch 12, flat-footed 12 (+1 Dex, +2 natural, +1 Dodge)
hp 27 (6d6+6)
Fort +3, Ref +6, Will +6
DR 5/cold iron; SR 14
Offense
Speed 10 ft., swim 50 ft.
Melee gore +6 (1d6+3), tail slap +1 (1d8+1)
Spell-like Abilities CL 6th, concentration +8
Constant—speak with animals
3/day—cure light wounds, faerie fire
1/day—sacrificial gift, shield other, suggestion (DC 15), water breathing
Statistics
Str 16, Dex 13, Con 12, Int 15, Wis 13, Cha 14
Base Atk +3; CMB +6; CMD 18
Feats Combat Expertise, Dodge, Skill Focus (Diplomacy)
Skills Acrobatics +10, Bluff +11, Diplomacy +14, Knowledge (local) +11, Knowledge (nature) +11, Perception +10, Sense Motive +10, Stealth +10, Swim +11
Languages Aquan, Common, Sylvan
SQ amphibious, change shape (Medium humanoid or dolphin, polymorph)
Ecology
Environment temperate coastlines and aquatic
Organization solitary, pair or school (3-10)
Treasure standard
Special Abilities
Sacrificial Gift (Sp) An aegipan can give its life to a dead creature touched as a standard action. This functions as a breath of life spell, except that it can affect a creature that has been dead for 1 minute per caster level, and the aegipan dies when it uses this spell-like ability. This is the equivalent of a 4th level spell.