Ammodytidae

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Ammodytidae (sand-lance, sand-eel; subclass Actinopterygii, order Perciformes) A family of fish that have elongated bodies and long dorsal fins. The pelvic fins are often absent. Feeding on animal plankton, the sand-eels themselves form an important part of the diet of cod, salmon, etc. There are about 12 species, found in marine coastal waters.