Marine Boy

Marine Boy, suspecting sabotage, investigates when an "unsinkable" nuclear ship is lost during a tornado.

A great underwater oil field is discovered by Dr. Mariner, but while drilling, the team at Satellite Station 23 collapses and Marine Boy is sent to investigate.

Marine Boy, Bullton, and Piper are ordered to the fishing boat Whoppercatch to investigate an SOS regarding a sea monster.

After arriving at the crash site of an unidentified aircraft, the P-1 witnesses an explosion and finds itself surrounded by huge, electronically controlled, poisonous starfish which are pawns of Stellardin.

Bullton and Piper find a missing fishing boat with no one aboard. Marine Boy and Splasher set out to solve the mystery of the crew's whereabouts.

During an expedition organized by Ocean Patrol, Dr. Mariner and his crew find a spear which is modeled after one known to be two thousand years old, but this spear is newly made.