Marine Boy

Marine Boy is a stealth anime series. When it was first run in the US in 1967, it was simply presented as a children's cartoon, not as a product from Japan.

Marine Boy shows examples of:
 * Scenery Censor - Mermaid Neptina wears nothing; her breasts are concealed by her long hair, a technique also used in the Japanese animated version of Hans Christian Andersen's The Little Mermaid.
 * Super Not-Drowning Skills - Professor Fumble's inventions: "oxy-gum" which Marine Boy can chew and receive hours of oxygenation.
 * Unscaled Merfolk - Neptina is half-dolphin instead of half-fish.