Siren

Commonly confused with mermaids by many land dwellers, sirens are a clever but aggressive subspecies of sincubus.

Appearance
Sirens do not walk on land, but live mostly underwater. As such they are far less humanoid than most sincubi. With seal-like hind quarters, pointed teeth, and small black eyes, sirens are among the least humanlike of their sincubus cousins.

Behaviour
Sirens imbue their singing voices with a sonic stimulant that arouses the sexual appetite of those who hear it. This stimulant is sometimes strong enough to cause humans who cannot locate the source of the sound to go insane.

Romanticised by folklore, sirens are said to lure sailors to their islands to pleasure them. In reality, sailors who find themselves amidst a pod of sirens are quickly torn to shreds and eaten alive.

Female sirens are much more common than males, and a mated pair act as leaders of the pod.

Trivia

 * Although seen in both sexes, sirens are much more commonly female.
 * As of The Great Filter, sirens have become much rarer. Very few reports exist of sirens living outside of Core Narcissium.