Dr. Mariner is Marine Boy's father and a prominent scientist within the Ocean Patrol, the international agency safeguarding oceanic order. He commands the organization's scientific research and technological development, focusing on advanced undersea technologies for defense, exploration, and supporting ocean floor operations like ranching, mineral extraction, oil drilling, and research communities.

A key inventor, he developed Marine Boy's specialized equipment. Collaborating with Professor Fumble, he designed the protective red wetsuit, resistant to penetration and extreme temperatures. Its boots feature powerful propeller packs for high-speed travel and delivering force, plus retractable flippers activated by heel clicks. Dr. Mariner also created "oxygum," a chewing gum supplying oxygen for extended underwater breathing without apparatus, primarily used by Marine Boy due to limited production. His sonic boomerang weapon, crafted from hardened alloy, cuts materials, deflects projectiles, and emits powerful electric shocks to disable systems and vessels.

His scientific contributions extend beyond his son's gear to broader Ocean Patrol assets. He developed research vehicles, submarine weaponry including rocket torpedoes, heat beams, sonic cannons, and laser beam guns, and versatile patrol boats like the P-1. Dr. Mariner supports his son's perilous missions through these inventions, implicitly endorsing his role with the Ocean Patrol.