Thanks to Steel!

One of the most feared villains of Atlantis, Trident's downfall came around when Aqualad, teamed with Beast Boy of Teen Titans, discovered his underground lair. Trident had found a way to clone himself, using containers of a nuclear substance he had commandeered off of a supply ship out in the ocean, allowing him to be in multiple places at once. After a scuffle with Aqualad and Beast Boy, the T-Sub, piloted by the remaining four titans and Aqualad's technician friend, Tram, they sealed off the entrance to Trident's cloning area with a few blasts from the sub's seismic blasters.