Mating Cuttlefish

My dive buddy just came back from her trip to Malapascua Island, north of Cebu, and hugely famed for its thresher sharks. Although she only did manage to have a 2 sec glimpse of the elusive, she did manage to capture this video of mating cuttlefish which is pretty amazing itself.

You can see that the female was trying to push her eggs into the cavities while the male tries to fertilize them with his sperm. That's when the other jealous male comes into the picture trying to establish his presence and take the female to himself.