Palaemon

Palaemon and her legion of sharks fought alongside Poseidon during the Second Olympian War. The God of the Sea sent the God of Dolphins Delphin to send her to the western front.

Debated Species
It is implied that Palaemon is the Goddess of Sharks, as she has a "legion of sharks". Though, as Palaemon is a genus of shrimp, she may be a goddess of shrimp. But, she may also be the Goddess of Sharks and Shrimps.