Lagoon Boy appeared in Atlantis when the King decreed that outsider sea people be allowed into Atlantis despite the protests of many elitist Atlanteans. This is due to an attempt by Aquaman to make Atlantis more open to citizens living outside the city, by granting them citizenship. Lagoon Boy comes to the citizenship ceremony on the day of King Orin and Queen Mera's marriage. While there he befriends Blubber, a humanoid whale with a genius IQ and his assistant, Sheeva the Mermaid.