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Rhinobatidae (shovelnose ray, guitarfish; superorder Batoidimorpha, order Rajiformes) A family of marine rays that have a rounded, shark-like trunk, but a broad head with wide, ray-like, pectoral fins, the overall body outline resembling a shovel. Often found in sandy or muddy areas, some species may reach a length of about 1 m. There are about 45 species, distributed world-wide.