Full orgin story, don't know if this is new, but i have'nt seen it.
source:
http://en.wikipedia.org/wiki/Aquaman
OYL Aquaman
More recently the Aquaman character has undergone a new change in origins. While the modern Aquaman has mysteriously disappeared, presumably during the Infinite Crisis, a new lad, called Arthur Joseph Curry, has come to the remains of the undersea empire of Atlantis. Son of Philip and Elaine Curry, two oceanobiologist who were researching in Avalon Bay marine and amphibian biology, was born three months premature. Her mother dead in childbirth, his father used a mutagenic serum to grew the little Arthur gills, permitting him to survive even without fully developed lungs, giving him in the process the same complete adaptament to undersea life of a true Atlantean. So Arthur lived most of his life in a special insulated water tank, his only contact with the outside world a TV set, growing fond of the superheroes. During a storm the special tank in which he was transported broke, and he was unleashed into the sea. Contacted by the mysterious Dweller in the Depths, he helped the King Shark, and delivered him to the mysterious wizard, who profetized him his new life... a mixture of the Golden Age Aquaman and the Modern Age one, in which, as a King in Atlantis aided by his two new friends, he will marry a reimaginated version of Mera, lost his son, be stricken by the Koryax Curse, and eventually be the hero the current Aquaman was. As a further matter of confusion, if the mysterious Dweller, a powerful wizard, remembers the Golden Age Aquaman as a tale of "long long ago", the King Shark still bears the scars of a previous battle with the Modern Age Aquaman, but these incongruencies were supposed to be explored during the Crisis.
