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Siyokoy

This eel-like creature sports sharp frills that run along the back of humanoid torso and down its long, powerful tail.

Siyokoy CR 10

XP 9,600

N Medium aberration (aquatic)

Init +5; Senses blindsight 60 ft., darkvision 60 ft., scent; Perception +22

Defense

AC 26, touch 16, flat-footed 20 (+5 Dex, +1 dodge, +10 natural)

hp 136 (13d8+78)

Fort +10, Ref +9, Will +10

DR 10/slashing; Immune cold, electricity, poison

Weaknesses light sensitivity

Offense

Speed 30 ft., swim 60 ft.

Melee bite +18 (1d6+9/19–20 plus grab), 2 claws +18 (1d6+9), tail slap +14 (1d6+4 plus stunning shock)

Space 5 ft.; Reach 5 ft. (10 ft. with tail slap)

Special Attacks constrict (2d6+4), stunning shock, swim-by attack

Statistics

Str 28, Dex 21, Con 22, Int 12, Wis 15, Cha 11

Base Atk +9; CMB +18 (+24 grapple); CMD 34

Feats Alertness, Dodge, Improved Critical (bite), Improved Grapple, Power Attack, Stealthy, Weapon Focus (tail slap)

Skills Disable Device +16, Escape Artist +7, Intimidate +9, Knowledge (geography) +10, Perception +22, Sense Motive +4, Stealth +25, Survival +16, Swim +25

Languages Aquan

Ecology

Environment any ocean

Organization solitary, pair, or bed (3–12)

Treasure double

Special Abilities

Stunning Shock (Su) A siyokoy can emit a strong electrical charge from its tail. When it hits a creature with its tail slap, the attack deals 3d6 points of electrical damage and the target must succeed at a DC 22 Fortitude save or be stunned for 1d4 rounds.

Swim-By Attack (Ex) Extremely quick in the water, a siyokoy gains Spring Attack as a bonus feat when swimming.

Siyokoys are eel-like aquatic creatures often mistaken for merfolk by sailors. On closer inspection, however, siyokoys' appearance might make one question the vision of said sailors, for apart from their humanoid arms, siyokoys are very much creatures of the sea.

Two primary species of siyokoys exist, although both are essentially identical as far as game statistics are concerned. The most commonly encountered siyokoys are those that dwell amid the caves and crags of coral reefs in relatively shallow oceanic waters. These siyokoys tend to have colorful patterns on their flesh to mimic the riot of hues the typical coral reef displays. Reef-dwelling siyokoys are fond of decorating their lairs with particularly strange or colorful specimens of coral, especially when such marine growths encrust sunken treasures.

A siyokoy variant that is encountered less frequently dwells in the deeper abysses of the ocean, far below the limits of the sun's ability to light. These siyokoys are darker colored, and they tend to be darker in personality as well. Whereas those dwelling in the bright, sunlit environs of a coral reef might be capricious or playful, those who dwell in the dark, vast deeps of the sea are often morbid, morose, and even sadistic. Most evil siyokoys dwell in such lightless, forgotten reaches of the world's oceans.

Regardless of where they dwell, siyokoys adore shipwrecks and long-forgotten ruins claimed by the oceans. Exploring these relics and recovering strange and wondrous treasures is what most siyokoys live for, and a siyokoy's lair is often decorated with the results of these scavenging expeditions to sunken ships and flooded cities. Strangely, siyokoys avoid making their lairs amid such ruins, mostly out of a strange superstition the creatures share about these areas—it is not lucky, say siyokoys, to sleep in a place where air breathing creatures have drowned.

A siyokoy is 7 feet long and weighs 200 pounds.