Manta & Moray (ep. 2) The Whale Killers (1978)

Manta, the last of a water-breathing civilization of humans, and his female companion Moray, who had been rescued from a shipwreck and raised by a friendly dolphin. Protectors of the Seaworld!
(the image quality is not very good, but i hope you 'll enjoy it as much as i do..)
one of the best shows from Filmation..