Rhombus took human form and seduced Miya Shimada and by all accounts, he believed that he and Miya conceived her daughter, Debbie. After Debbie's birth, Rhombus revealed its/his sinister side and attacked Tsunami. Miya defeated him with the aid of the ancient Atlantean sorcerer, Atlan. Atlan stripped the gem from its host and banished it to space. Atlan and then also imbued Tsunami with new powers and renewed youth. Atlan used a similar serum to extend he and his brother Haumond's lives for millennia. Tsunami would now be able to sense Rhombus' presence and was better equipped to defeat him. Many years later, Atlan himself would resurface claiming to be Debbie's father (making her Aquaman's half-sister).
Tsunami never did, in so many words, claim that Rhombus was Debbie's father, but she was fairly clear that Perkins was not the father. Miya allowed both Neptune and Debbie to believe they were father and daughter.
- Unique Physiology: Rather than being a living being, Rhombus is an animated energy construct. 
- Energy Projection: Rhombus can project energy blasts from his hands. These blasts can be focused focused into a beam or made to have a wider attack range to hit more than one target. The energy blasts are heat-based, leaving victims singed if they are lucky or charred if they are not.
- Flight: Rhombus is shown to be able to travel through air through a force of will as easily as he travels through water.
- Self-Sustenance: Rhombus was able to survive in space without food, water, or air.
- 2 Appearances of Rhombus (New Earth)
- 1 Images featuring Rhombus (New Earth)
- Quotations by or about Rhombus (New Earth)
- Character Gallery: Rhombus (New Earth)
This character, team or organization, is or was primarily an enemy of Aquaman, or members of the Aquaman Family. This template will categorize articles that include it into the category "Aquaman Villains."