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For the ochre sea star (Pisaster ochraceus), eating is truly an out-of-body experience. When feeding on mussels or snails, the ochre sea star will turn its stomach out through its mouth and into the shells of its prey along with digestive juices that liquefy its meal, then consume it. Ochre sea stars can squeeze their stomachs through shell openings or slits as narrow as 0.1 mm, letting them get to the “meat of the situation.” 
Photo: D. Gordon E. Robertson