King Kamuu was the king of Atlantis, and husband of Zartra, about 21,000 years ago.
Kamuu banished the sorceress Zhered-Na from Atlantis for prophesying that the content would sink below the ocean.
Kamuu was also the name of the first Homo Mermanus King of Atlantis.
The spirit of Kamuu visited Namor, modern-day heir to the throne of Atlantis, in his dreams. Kamuu warned Namor that Morgan Le Fay sought to raise Atlantis, giving Namor the knowledge to stop her.