Sea spiders don't do anything by the book, and researchers have just gotten to the bottom of how they breathe.

Unlike the majority of spiders, which dwell on land, the diving bell spider spends most of its life underwater. It is the only species of spider that is able to thrive in such a watery habitat.

Spiders are everywhere – even underwater. The diving bell spider, or water spider (Argyroneta aquatica), is known to live entirely underwater, from resting, catching and eating prey, as well as ...