Dolphin is the sole surviving member of an alien experiment on Humans. She was freed by the spirit of Kordax the Cursed, from Atlantis' early days, then found by Navy officer Chris Landau and his crew. She was initially an attraction at Oceanworld but eventually returned to the sea. Like the mammal she's named after, her mind is of the moment, with little memory, and she did not recall Landau when they met later again. Instead, she found Atlantis and was welcomed by its people.
Once there she initially flirted with Aquaman himself, but fell in love with his adopted son, Tempest. She joined the two on several journeys until she and Tempest married. They had a child, during the war between Atlantis and Cerdia. The baby was named "Cerdian" to help heal the conflict. Dolphin insisted that Tempest give up his work with the Teen Titans to devote his time to their family.
Sadly, Garth's retirement did not bring the tranquility Dolphin had hoped for. During the Infinite Crisis, the Spectre, who had been driven unstable without a human host and on a rampage against magic, homed in on the strong magical energy of Atlantis, and destroyed the city. Garth later turned up, unable to properly breath underwater, and without any idea on where Dolphin and Cerdian were.
The fate of Dolphin and Cerdian would eventually be revealed when Garth found their bodies buried underneath the rubble of the destroyed city. It was believed they were buried underneath the rubble while attempting to find shelter.
Dolphin's body would eventually be revived alongside Aquaman and Tula at Mercy Reef as Black Lanterns tasked with killing Tempest and Mera. While attacking Tempest Dolphin and Tula would take advantage Gar's feelings for them and make him guilty for his failure to save either of them. they would kill Tempest and have him revived as a Black Lantern. She would face off against the Teen Titans only to defeated by a burst of white light from Dove II. 
- Unique Physiology
- Although this character was originally introduced during DC's Earth-One era of publication, their existence following the events of the 1985–86 limited series Crisis on Infinite Earths remains intact. However, some elements of the character's Pre-Crisis history may have been altered or removed for Post-Crisis New Earth continuity, and should be considered apocryphal.
- 123 Appearances of Dolphin (New Earth)
- 45 Images featuring Dolphin (New Earth)
- 4 Quotations by or about Dolphin (New Earth)
- Character Gallery: Dolphin (New Earth)
|Aquaman Family member|
This character is or was an ally of Aquaman, and a member of the Aqua-Family and/or its supporting cast. This template will automatically categorize articles that include it into the "Aquaman Supporting Cast" category. See also: Aquaman Villains.
|Black Lantern Corps member|
This character is or was a member of the Black Lantern Corps. Those who have died may wield the Black Power Ring, symbolizing their lack of both life and emotion.
This template will categorize articles that include it into the "Black Lantern Corps members category."
|Justice League member|
This character is or was a member of the Justice League of America, or the Justice League in any of its various incarnations, sworn by a duty to act as guardians of America and the world by using their skills and/or superpowers to protect Earth from both interstellar and domestic threats.