The Gargon was a large billfish that was considered very dangerous by the undersea races. It was capable of giving of a very large electrical charge, one that, according to Troy Tempest, was powerful enough to upset the guidance systems on a Sting Missile. It also possessed a serrated bill, similar to that of a sawfish.
King Titan used a device to attract a gargon to destroy a bathyscape that was being used to extract gold from the sea floor. Captain Tempest turned the tables on Titan when he placed the device on Titan's sub, and the gargon began to attack Titan's craft instead.