TV-Series
Description
No information could be found for a character named Dr. Marina in the anime Dolphin Prince. The available sources for this anime consistently refer to a character named Dr. Mariner. This response will provide a comprehensive description of Dr. Mariner as presented in the Dolphin Prince series and its related adaptations.

Dr. Mariner is an oceanographer who serves as a key scientist for the Ocean Patrol, the futuristic underwater policing agency that forms the backbone of the series' setting. As a senior member of the organization's research and development department, he is responsible for creating and advancing much of the technology used to protect the world's oceans. The series is set in a future where humanity has extensively explored and colonized the sea, establishing facilities for ranching, mining, and research, and it is within this frontier that Dr. Mariner conducts his vital work.

In his role, Dr. Mariner is the father of the protagonist, a young boy known as Marine Boy or Dolphin Prince. Their relationship is a central dynamic, as Dr. Mariner’s scientific expertise directly enables his son's dangerous missions. He is the inventor of the specialized red wetsuit that protects and equips the hero, which includes features such as a built-in jetpack for swift underwater travel and the supply of Oxygum, a special chewing gum that provides the user with breathable air underwater. He also designed the aqua-boomerang, a non-lethal weapon used to stun enemies. His motivations are driven by a professional dedication to oceanographic research and a personal commitment to keeping the seas safe, often working alongside a brilliant but less serious colleague named Professor Fumble.

While Dr. Mariner is a man of science rather than a field agent, his inventions put him at the heart of the Ocean Patrol's operations. He typically works from patrol boats, such as the P-1, or from research facilities, providing strategic and technical support. His personality is that of a dedicated and intelligent professional, whose paternal concern for his son is balanced by the necessity of allowing him to use his enhanced abilities to combat threats. Unlike his impulsive and adventurous son, Dr. Mariner represents the thoughtful, methodical side of their partnership, always developing new defensive and offensive arsenals to counter the megalomaniacs who threaten the undersea world. In the original experimental black-and-white series, Dolphin Prince, Dr. Mariner appeared alongside the young hero, his mermaid friend Neptuna, and a pet dolphin in adventures like Secret Of The Red Vortex, Call Of The Sea, and Attack Of The Sea-Star People.