Hexagrammidae
Hexagrammidae is a family of marine ray-finned fish belonging to the order Perciformes. Commonly known as greenlings, this family is characterized by a long, continuous dorsal fin and a typically elongated body. They are found in the North Pacific Ocean, inhabiting coastal waters, kelp forests, and rocky reefs. Greenlings are generally a moderate size, with species varying from small to medium. Their coloration often provides camouflage, with patterns and hues that blend with their environment, ranging from greenish and brown to red and gray. Some species exhibit sexual dimorphism in coloration. Their diet consists primarily of invertebrates, such as crustaceans and mollusks, and small fish. Hexagrammidae are an important part of the marine ecosystem, serving as both predators and prey. Economically, some species are targeted by commercial and recreational fisheries, valued for their flesh. Reproduction typically involves external fertilization, with females laying eggs which are then fertilized by males. Parental care can vary among species, with some exhibiting guarding behavior. Notable genera within the family include Hexagrammos, Oxylebius, and Pleurogrammus.