Merpeople
Aqualad: [USA] Atlantean from DC Comics (pre-crisis Earth-1, post-crisis Earth-0).
Garth: [USA] Atlantean from DC Comics (pre-crisis Earth-1, post-crisis Earth-0).
Roman: [USA] Character from both Rob Liefeld's part of the original Image Universe and his revised universe.
Roy Roman: [USA] Character from both Rob Liefeld's part of the original Image Universe and his revised universe.
Tempest: [USA] Atlantean from DC Comics (pre-crisis Earth-1, post-crisis Earth-0).