In Hawaii they call this spider the pe'e pe'e aka 'ole, but to the rest of us it's the Kauai cave wolf spider, a 3/4-inch long arachnid that, unlike other wolf spiders, has no eyes.
Like the fen raft spider, it chases down prey and catches it instead of building a web, and it depends on the endangered Kauai cave arthropod for food. The female lays as many as 30 eggs at one time and carries the baby spiders on her back until they are old enough to fend for themselves.
As humans take over the country's caves for development and agriculture, the Kauai cave wolf spider population has dwindled, says Earth's Endangered.
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Photo via Southeastern Outdoors