Sharkbody abomination

Sharkbody abominations are aberrations mutating humanoids into shark hybrids.

Appearance
Sharkbody abominations have muscular humanoid bodies, but have the coarse gray skin and head of a shark.

Characteristics
Sharkbody abominations are created by a sahuagin ritual that mutates the body of a humanoid creature into a shark-humanoid hybrid. They retain their previous intelligence and personality, but are subservient to their sahuagin creator's Shark Telepathy ability.

Abilities

 * Blood Frenzy: The abomination has advantage on melee attack rolls against creatures that don't have all their hit points.
 * Limited Amphibiousness: The abomination can breathe air and water but must be submerged at least once every 4 hours to avoid suffocating.
 * Cursed Transformation: The abomination is reverted to its original form when affected by the Remove Curse spell or similar magic.
 * Bite: The abomination makes a bite attack, dealing moderate piercing damage.

Tide of Retribution
in 835 PD, sahuagin warlock Selachai lead the Sharkfeather clan in an attack on Palma Flora, sinking Flora Isle beneath the ocean. From the citizens killed in the attack, she transformed them into sharkbody abominations using magic granted by her patron Uk'otoa. An adventuring party hired by the pirate Three Earrings battled several of these abominations when they dove into Sharkfeather Abyss to retrieve Selachai's Rod of Retribution.

Trivia
While sharkbody abominations are described as retaining their intelligence from their former humanoid form, this isn't reflected in their stat block, which has the Intelligence score of a hunter shark (1).