Ben 10

S02:E10 - They Lurk Below

Max's longtime friend has just built the world's only underwater resort, and Ben, Gwen and Max are invited for a sneak peak. But it turns out that to power the resort, Max's friend took an energy orb from a race of underwater aliens: the same aliens responsible for The Bermuda Triangle! Now the aliens want their energy orb back, and they destroy the resort in order to get it.