Apparently I love to read and write about sea creatures. Via Brad I hear about what's known as a black devilfish (a.k.a. a humpback anglerfish), what's got to be the most extreme gender reversal I've heard of yet in nature.
The male devilfish bites a larger, more attractive mate and never lets go. He stays to become a symbiotic being with the female, depending on her for food and oxygen. Talk about taking on the role of breadwinner.