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greenling,common name for any of several species of carnivorous, spiny-finned fishes of the family Hexagrammidae, common in the Pacific Ocean, especially in the waters N of Monterey, Calif. Greenlings have fleshy flaps on the top of the head. They are found in kelp beds and among rocks, and are also called rock trout. Several species grow to a length of 20 in. (50 cm) and are valued as game fishes. Most important of the greenlings is the Okhotsk atka mackerel, found in the Sea of Okhotsk; it is a handsome food fish with striking vertical stripes, as is the closely related atka mackerel of Alaska. The ling cod, found from Alaska to Baja California, is a popular game and food fish. The kelp greenling is unusual in that the male and female exhibit different coloration and markings, a rare phenomenon among fish. Greenlings are classified in the phylum ChordataChordata
, phylum of animals having a notochord, or dorsal stiffening rod, as the chief internal skeletal support at some stage of their development. Most chordates are vertebrates (animals with backbones), but the phylum also includes some small marine invertebrate animals.
..... Click the link for more information. , subphylum Vertebrata, class Actinopterygii, order Scorpaeniformes, family Hexagrammidae.