This here is my favorite fish. The beautiful anglerfish. The female are dominant and in at least some species the males are much smaller and attach themselves to the body of the female and live as a parasite until they are absorbed by the larger female!
They are ambush predators so the sharp teeth help with catching the prey and not letting go! Bonus fact, most angler fish are small, under a foot, and you can keep some species in a home aquarium.