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Calvin Durham is the foster father of Kaldur'ahm.

Physical appearance

Calvin is a fairly tall man with a dark brown skin-tone, brown eyes and no hair. However, after being experimented on by Black Manta he now possesses gills and webbed hands and feet. He wears a simple, skintight purple Atlantean garment. Around his waist is a lighter colored stripe like a belt. There is a stripe in the same color around the end of his sleeves, and over his shins as well.[1]


Early life

Durham was originally one of Black Manta's henchmen. He was genetically engineered to become a water-breather to infiltrate and destroy Atlantis from the inside, but he forsook his mission when he met Sha'lain'a. They married, and he raised Kaldur'ahm as his son in the city of Shayeris.[2]


September 6, 01:31 UTC-2

Calvin welcomed his son and his friends back to Atlantis, but warned him about unrest in the capital.[3]


January 2, 11:19 UTC-2
January 21, 23:28 UTC-2

Powers and abilities

  • Atlantean attributes:[nb 1] Atlanteans, although human, have through scientific and sorcerous means[3] developed several abilities which allow them to live comfortably under the sea:
  • Underwater breathing: As a result of his experimentation, Calvin has gained the Atlanteans abilities of surviving the aquatic atmosphere under the sea. Some accomplish this without the presence of visible gills.[4][3]
  • Temperature resilience: Resistant to low temperatures[5] and the effects of freezing,[6] although notably hindered by high temperatures.[7]
  • Durability: Dense flesh, although not invulnerable.[8][3][9]
  • Strength: Ranging from undetected levels to super strength.[6][3][10]



  1. Calvin was not born Atlantean, but was genetically modified to survive the same conditions.

Background information

  • Calvin Durham was introduced in the Death of a Prince storyline. After defecting from Black Manta, he became an ally of Aquaman and later mayor of Sub Diego.
  • This is his first animated appearance.


  1. 1.0 1.1 Jones, Christopher (2013-01-29). Character Design – Young Justice #14 – ATLANTIS!. ChristopherJonesArt. Retrieved 2013-01-29.
  2. Hopps, Kevin, Greg Weisman (w). Davis, Dan, Christopher Jones (p). Davis, Dan (i). Atkinson, Zac (col). Sienty, Dezi (let). Chadwick, Jim (ed). "Cold Case" Young Justice 9 (October 19, 2011), New York, NY: DC Comics
  3. 3.0 3.1 3.2 3.3 3.4 Weisman, Greg, Kevin Hopps (w). Jones, Christopher (a). Atkinson, Zac (col). Sienty, Dezi (let). Chadwick, Jim (ed). "Under the Surface..." Young Justice 14 (March 21, 2012), New York, NY: DC Comics
  4. Hopps, Kevin (writer) & Oliva, Jay (director) (March 4, 2011). "Downtime". Young Justice. Season 1. Episode 8. Cartoon Network.
  5. Dubuc, Nicole (writer) & Oliva, Jay (director) (November 4, 2011). "Failsafe". Young Justice. Season 1. Episode 16. Cartoon Network.
  6. 6.0 6.1 Weisman, Greg (writer) & Oliva, Jay (director) (November 26, 2010). "Independence Day". Young Justice. Season 1. Episode 1. Cartoon Network.
  7. Pugsley, Tom (writer) & Chang, Michael (director) (February 18, 2011). "Denial". Young Justice. Season 1. Episode 7. Cartoon Network.
  8. Robinson, Andrew (writer) & Berkeley, Christopher (director) (September 16, 2011). "Targets". Young Justice. Season 1. Episode 10. Cartoon Network.
  9. Hopps, Kevin (writer) & Divar, Tim (director) (Originally released on iTunes on October 14, 2012, broadcast on January 5, 2013). "Before the Dawn". Young Justice. Season 2. Episode 10. Cartoon Network.
  10. Hopps, Kevin (writer) & Chang, Michael (director) (October 14, 2011). "Revelation". Young Justice. Season 1. Episode 14. Cartoon Network.