King Humpback was the SeaWing king in the timeline of Darkstalker (Legends), and the husband of Queen Lagoon. He was killed in the Royal SeaWing Massacre, when Albatross went mad and killed nearly his entire family. He was described by Fathom to have a creaky old voice and often commented on how things were back when he was a dragonet. Pearl seems to think he's annoying whenever he tells his old stories of his earlier days.
When Pearl, Fathom and Indigo are getting dressed for the party, Pearl helps adjust Indigo's pearls. Indigo thanks her and Pearl tells Indigo that in return, she could distract Humpack whenever he tries to drone on and on about the old days and his scavenger supply to her. This breaks the three into a laughing fit.
At the party, Humpback is seen along with his wife, Queen Lagoon and their daughter, Splash. He is stabbed and killed by Albatross immediately after he kills Lagoon.
- His name is derived from the humpback whale.
- He is the fourth king to have appeared so far, and the second SeaWing king to be named, with the others being Tsunami's father, King Gill, King Darkstalker, and King Char.
- Pearl imitates his "creaky old voice" before the massacre on the Island Palace.
- It is noted that he enjoys eating scavengers.
Present: Abalone • Flounder • Herring • Herring's Brother • Kelp • Lagoon • Nautilus • Pearl • Piranha • Riptide • Snapper • Squid • Tempest • Tortoise • Urchin • Webs • Whirlpool