Sea spiders don't have the ability to spin webs; instead, they use their tubelike proboscis (nose-like structure) to suck the life out of their prey. The tip of the proboscis has three lips; some even have teeth. Once inside the proboscis, the juices are mixed with enzymes for digestion. Sea spiders eat sponges, jellyfish, sea anemones, and other prey. One group of scientists even observed a sea spider clipping off a sea anemone's tentacles in order to suck out the juices later.