Black Manta

Black Manta is Aquaman's arch enemy. He is an Atlantean. Black Manta was revealed to be Aqualad's father. It is unknown how Aqualad feels about this, or if he even knows.

Present
He and his men attempted to steal a large starfish creature frozen in ice. He is later revealed to be in cahoots with The Light when he mentions of obtaining a sample of the starfish creature.