27 episodes, based on the manga by Osamu Tezuka
directed by Yoshiyuki Tomino for TV Asahi
“Triton of the Sea” (originally titled “Blue Triton”) tells the heroic story of Triton, the sole survivor of the destruction of Atlantis five thousand years ago. The sea god Poseidon and his family destroyed both the island and Triton’s family because of a jealous rivalry between the two clans. Triton is rescued and raised by humans but he returns to the sea to avenge the murder of his family by killing the offspring of Poseidon. He does so with the help of his dolphin companions and he also marries the last surviving mermaid, Pipiko, with whom he has seven children, named after the colors of the rainbow. The saga of inter-familial strife between the two families plays out in a tragic manner, with both Triton and Poseidon dying in the end. The children of Triton and other merpeople are left to find a place to live far away from the humans who hunt them.
The plot has little to do with any traditional Greek mythological narrative associated with the sea gods Triton or Poseidon, but it is clearly inspired by mythical figures and the motifs of ancient heroic epic.
A feature length film, also titled Triton of the Sea, was produced as a sequel to the TV show in 1979.