Sea Leopard possessed superhuman strength and stamina, his speed under the sea was equal to that of Prince Namor. He also possessed powers of the mind allowing him to read the thoughts of others giving him the element of surprise in combat. This telepathy also him to communicate with sea life with his proximity. It appears that the Sea Leopard also had extended life or a slow aging process.
The origin and history of the Sea Leopard remains a mystery. He stated that he was a member of the Ancients of Lemuria and he was in-fact of Royal blood. He was guardian of the sacred horde, which was revealed to be Antarctic Vibranium the cargo of the ship Endurance that was Captained by Ernest H. Shackelton in 1915. Sea Leopard revealed himself to the ship's crew after their vessel sank into the sea, and he informed them that they had violated the "sacred horde." Later after Antarctic Atlantis was destroyed by Paul Destiny Sea Leopard found refuge within the ruined city,