Don't ask me why... I don't even read any Aquaman stuff!
I'm really bored so I re-imagined what Black Manta could've looked like if he was more practical.
He could be some awesome mercenary hiding in a nuclear submarine in the coldest and deepest depths of our oceans, selling his loyalty to some foreign warlord or dictator and having lots of fun with nuclear weapons. He'll also have practical skills such as cyber terrorism to manipulate a lot of our digital economy and other boring infrastructures. You know, what evil people do for money.
Helmet design inspired by B12 bombers and jet pilot pressure suits for those deep sea pressure goodness.