Seth was a Warlord of Atlantis, in charge of the fleet when Prince Namor was accused of betraying the Atlanteans. He accompanied Namor is his quest to find the herb of healing to restore Tiger Shark to his human form, but was struck unconcious during their battle with the Lethe Beast[1]. When he awoke, he found himself alone and believed Namor had been slain. To make up for his supposed disgrace, he searched for the Horn of Proteus. He returned with the horn to Atlantis, when the Atlanteans under the command of Lady Dorma were gathering their troops to attack New York in an attempt to rescue Namor. Seth used the Horn to summon several undersea creatures which began attacking the city. In order to save the city, he used the Horn again to lead the creatures out to sea, where he, the creatures and the horn were buried in an undersea earthquake[2].

Seth was rescued by the Faceless Ones and remained as a captive of the "Old Ones" for many years. He escaped in a state of confusion to return to Atlantis. [3]


Seth possesses the conventional attributes of Homo mermanus: gills that extract oxygen from water, superhuman physiology to withstand extreme pressures and temperatures, and acute vision. He can swim at approximately 30 miles per hour. He can remain out of water for approximately nine minutes before beginning to suffocate. However, he can operate on the surface by wearing a water-filled helmet or using a chemical that enables him to draw oxygen from the air.

Seth was in love with Lady Dorma but was always loyal to his friend and monarch Namor.

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