What does a ménage à trois between whales look like?

A three-way between cetaceans involves two pliant, 7-foot-long penises, one well-attended female, and a free-love take on competitive mating. NSFW, if you haven't learned about the birds and the bees yet.

Over at Scientopia, blogmistress Scicurious brings to readers' attention the 2005 paper "Observations of a Female North Atlantic Right Whale (Eubalaena glacialis) in Simultaneous Copulation with Two Males: Supporting Evidence for Sperm Competition" from the journal Aquatic Mammals (Mate, et al.; citation). In this academic tour de force, the authors discuss the mating habits of the North Atlantic Right Whale. The males of the species have flexible penises that are somewhere between 2-2.5 meters long and testicles that literally weigh a ton. Why do the whales have such gargantuan genitalia? Allow Scicurious to elucidate:

What does a ménage à trois between whales look like?

[S]ome scientists have hypothesized that, because the male right whale also has huge balls, it might also have a lot of competition for the ladies during mating season, and that this leads to large balls and large amounts of sperm. And…they were right. More right than they thought. Because right whales do group up to get near a female at the surface (called a Surface Active Group). But unlike humpback whales, who will fight aggressively to get the girl, right whales are…a little more cooperative [...]

The black arrows point out the individuals. You can see the female there is on her back, while the males on either side are rolled on their sides, their penises each going in to her vagina.

The whales' large testicles ensure that an absolutely frightening volume of sperm is produced, as they must compete with other equally virile males (occasionally at the same time). Woe, to be a scuba-diving documentary filmmaker during North Atlantic Right Whale mating season.

Hat tip to Jack!