The creature is a fish-like humanoid, with webbed feet and hands, gills, and a finned tail. It has additional webbing down its back, at the elbows, and where human ears would be. It has usually green, moist, scaly skin.
About one in every 216 hatchlings possessed four functional arms. Known as "barons", these four-armed mutations were often black, fading to gray in color. While sahuagin usually killed off defective hatchlings, they allowed these to live.
Sahuagin lived in underwater settlements that also had underground passages and tunnels, which connected the houses above the floor. Their society was strictly patriarcal, with a king ruling over princes, who in turn ruled over barons. Each baron ruled over a village, while a prince would dominate twenty villages and a king would govern an entire coastline. Kings would administer cities of several thousands inhabitants, and their palace were always much bigger than any of the other buildings in the area. Although they didn't rule, females had similar hierarchies among teachers, lore-keepers and priestesses.
Across fog-shrouded coasts or endless ocean swells, an ominous drone sounded on a conch shell chills the blood of all who hear it. This is the sound of the sahuagin hunting horn-a call to raid and battle. Coastal settlers refer to sahuagin as "sea devils," for sahuagin have no compassion in them, slaughtering the crews of ships and decimating coastal villages.
Devils of the Deep. Sahuagin are a predatory, piscine race that ventures from the ocean's black depths to hunt the creatures of the shallows and shore. Though they dwell in the deepest trenches of the ocean, sahuagin view the entire aquatic realm as their kingdom and the creatures in it as blood sport for their hunting parties.
The self-styled rulers of sahuagin ocean domains are massive mutant males that grow second sets of arms. They are terrible foes in battle, and all sahuagin bow down before these powerful barons.
Way of the Shark. Sahuagin worship the
Shark god Sekolah. Only female sahuagin are deemed worthy of channeling the god's power, and priestesses hold tremendous sway in sahuagin communities.
Sahuagin are driven into a frenzy by the smell of fresh blood. As worshipers of Sekolah, they also have a special kinship with sharks, which they train as attack animals. Even untrained sharks recognize sahuagin as allies and don't prey on them.
Elven Enmity. The sahuagin might control the oceans if not for the presence of their mortal enemies, the aquatic elves. Wars between the two races have raged for centuries across the coasts and seas of the world, disrupting maritime trade and drawing other races into the bloody conflict.
So intense is sahuagin hatred for the aquatic elves that the sea devils have adapted to combat their ancient foes. A sahuagin born near enough to an aquatic
Elf community can enter the world as a malenti-a sahuagin that physically resembles an aquatic
Elf in every way. Sahuagin are
Prone to mutation, but whether this rare phenomenon is a result of the wars between the sahuagin and the aquatic elves-or whether it preceded or even began the conflict-none can say.
The sahuagin put the malenti to good use as spies and assassins in aquatic
Elf Cities and the societies of other creatures that pose a threat to sahuagin. The mere shadow of the malenti threat incites paranoia and suspicion among aquatic elves, whose resilience is weakened as the prelude to an actual sahuagin invasion.
“The village was empty, the seagulls were strangely quiet, and all we could hear was the surge of the sea.”
— An account of the aftermath of a sahuagin raid
The Menagerie fought one in the hollow tree on Outding Refuge