Lacedon

Lacedons were an aquatic type of ghoul. Similar to ghouls in all other respects, they were distinguished by their natural ability to swim as well as they could walk.

They were found only in water, usually prowling near unseen reefs and other dangerous locations where boats and ships were at risk of sinking.

History
In 1375 DR, during an undead army's assault upon Thay, lacedons were seen traveling along the rivers of the Sunrise Mountains.

Arklem Greeth, a lich who long ruled in the Host Tower of Luskan, commanded a group of lacedon to ambush a fleet of supply ships from Waterdeep en route to the war-torn city of Luskan. Greeth used the lacedon to intercept the supply ship caravan in order to keep the people of Luskan hungry and desperate in retaliation for Captain Deudermont driving him from the city.