ANGLERFISH (female host with males attached)
I still can’t get over the sexual dimorphism of this species of deep sea fish. The big fish well, that’s the female. The two fish appearing to nurse at the bottom - those are male. They aren’t nursing. They, at birth, exist only to find a female, no mean feat in the deep, dark ocean. When they do, they bite and latch on to her and then FUSE to her body at the circulatory level like a parasite would. Over time, the male is completely absorbed but for his testicles, which remain outside of her body to fertilize her eggs. As you can see, more than one male can attach to a female. That might also be one on her forehead, tough to say - some species of Anglerfish also have the bioluminate bits (like fishing poles) dangling from their heads over their mouths to attract food.
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ソーシャル・ネットワーキング サービス [mixi(ミクシィ)]