What looks like a spider but isn’t one, lives underwater and breathes through its legs? That would be the mysterious sea spider. With over 1,300 species living in every ocean, these marine arthropods ...

Scientists have decoded the sea spider’s genome for the first time, revealing how its strangely shaped body—with organs in its legs and barely any abdomen—may be tied to a missing gene. The detailed ...

A male sea spider, preserved for imaging under a microscope, carries egg sacs after mating with two different females. Shana Goffredi Researchers have discovered three new sea spider species that are ...