The spindly-legged creatures, which are not closely related to spiders, defy expectations of fatherhood in the animal kingdom.
An Antarctic giant sea spider sits on the ocean floor at Dayton’s Wall, a biodiverse area in Antarctica, in 2015.
In fact, these animals also have a tiny body and store all their internal organs in their limbs. “They’re all legs,” saysIn the past, male sea spiders may have attached eggs to a safe place, like a rock. Over the eons, the animals likely started gluing eggs on themselves to help their young survive—providing them with an evolutionary advantage.
Instead, they meticulously glue their eggs to a rock or other substrate at the bottom of the ocean. For two days, “the male just kind of walks around the egg mass and seems to be grooming it,” says study leaderThis behavior may provide a possible explanation on how male sea spiders evolved to be the primary parent. “We have evidence of a species that does something in the middle.
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