Aplysia Californica?
Aplysia Californica?
Like all sea hares, the California sea hare is hermaphroditic, acting as male and female simultaneously during mating. Aplysia is known to form mating chains with up to 20 animals, thus each animal can serve as male and female at the same time.(Wikipedia)
With genitalia at either end, these "mating chains" sometimes connect into complete circles; cluster fucks, or circle jerks, to use the scientific term.
Mme Reclus used to call it "Californicating". Isn't science wonderful?