Marvin Meno is a character created by Hanna-Barbera Productions in association with King Features Syndicate. He appeared in an episode from The All-New Popeye Hour's Popeye's Treasure Hunt segment, in the episode titled "Captain Meno's Sunken Treasure", which was released on November 4, 1978.
Marvin is the grandson of Captain Meno, an explorer and treasure seeker. Marvin has followed in his grandfather's footsteps and has taken on the same activities. Also, like his grandfather, he is the pilot and owner of a submarine.
Marvin has been in search of his grandfather's submarine which was lost on its last voyage as was Captain Meno. Marvin was able to find considerable information on the lost vessel but needs assistance to recover it and the treasures it holds. This leads Marvin to hire the services of Popeye & Olive Treasure Seekers Ltd. for that assistance.
Popeye was able to make good use of Marvin's clues to find and salvage Captain Meno's sunken sub. Marvin may also have Bluto of Bluto's Treasure Salvage to thank for that success in a way. Although Bluto intended to steal the Captain's lost treasure, it was Bluto's undersea camera that found it. Luckily, Popeye was there to stop Bluto and ensure Marvin's favorable outcome.