PHANTOM FROM 10000 LEAGUES

The movie begins when a fisherman is killed by a mysterious monster. Two government agents later find the body on the beach. One of the agents, Ted, tries to get a sample of a radio-active rock in the sea, but the same monster attacks him. Ted is able to escape and return to the beach. On a later trip with the other agent, the monster nearly kills Ted, but the other agent is able to shoot it with a spear gun. Ted discovers that Dr. King, a marine biologist, created the monster and the radio-active rock. Ted tells Dr. King how the monster is killing innocent people and that it must be stopped. After Dr. King destroys his lab he goes to kill his creation using dynamite. Shortly before detonation, the monster grabs him. The dynamite explodes, destroying the rock and killing the monster and Dr. King. Ted arrives just in time to witness the explosion.