Hmmm… this is one weird spider! The great raft spider, (Dolomedes plantarius), may look like a spider that will be clinging to your arm in the middle of a desert, but really, these spiders hunt on the water. That’s right! But how? This spider uses the surface tension of the water to support their weight, and then they wait for their prey to come by. They eat pond skaters, dragonfly larvae, small fish and other, smaller, aquatic spiders. They are going extinct because of degradation and habitat loss.