Kaldur'ahm first appears in the episode "Let's Get Serious," where he, along with his teammates Superboy and Miss Martian, help defeat the H.I.V.E. Five. He then confronts Robin and calls him out on how silly the Teen Titans are, saying they mock what heroes are actually meant to be.
Kadur'ahm is an Atlantean with light blond hair cut at the bottom, deep brown skin, pale green eyes, high cheek bones, and a lean build. He possesses black, eel-like tattoos that run across his back and along his arms and glow a bright blue when using his powers. He also has webbed hands and feet and possesses a set of gills that allow him to breathe underwater.
His superhero costume is a skin-tight, full-body, red-and-blue swimsuit that exposes his arms and feet. The costume has a set of small dorsal fins on the back of the calves.
Powers and abilities
- Hand-To-Hand Combat: Kaldur'ahm is extremely skilled in hand-to-hand combat.
- Water Manipulation: Kaldur'ahm can bend and reshape water at will.
- Hard Water Constructs: Kaldur'ahm can make water "solid" and utilize it as weapons.
- Leadership: Kalur'ahm is able to successfully lead his comrades Superboy and Miss Martian in battle.
- Let's Get Serious (debut)
- He is not to be confused with Garth, who is a different character who uses the same hero alias.
- Khary Payton, the voice actor of Cyborg, also voiced Kaldur'ahm in Young Justice.
- Kaldur'ahm is the only member of Young Justice to speak in "Let's Get Serious."
Voice in other languages
- Gábor Varga (Hungarian)
- ? (Italian)
- Damian Victor Oancea (Romanian)
- Kamil Kula (Polish)