Hexagrammos
Hexagrammos | ||||||||||||
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![]() Green kelp ( Hexagrammos decagrammus ), female. |
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Systematics | ||||||||||||
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Scientific name of the subfamily | ||||||||||||
Hexagramminae | ||||||||||||
Jordan , 1888 | ||||||||||||
Scientific name of the genus | ||||||||||||
Hexagrammos | ||||||||||||
Tilesius , 1810 |
Hexagrammos is a genus of fish from the order of the perch-like (Perciformes). The species of the genus live near the coast in the northern Pacific from the Yellow Sea , Japan , Korea and the Kuril Islands via the Sea of Okhotsk , Kamchatka , the Bering Sea and the Aleutian Islands to southern California .
features
Hexagrammos species are elongated fish that reach a length of 30 to 61 cm. Her head is devoid of major bony ridges and thorns. It is covered by ctenoid scales. The continuous dorsal fin is divided by an indentation into a front part with hard rays and a rear part with soft rays . The anal fin is without spine rays. The caudal fin ends rounded. The number of vertebrae is 47 to 57. The fish have five lateral lines , the first and the second run close together just below the center line of the back, the third from the upper end of the gill cover to the center of the caudal stalk. The fourth side line is on the ventral side and begins below the base of the pectoral fin. It can be short and end below the base of the pelvic fin or extend to the tail fin stalk. The fifth sideline begins on the midline of the throat and divides in front of the anus. Only Hexagrammos agrammus (subgenus Agrammus ) has a single sideline. Hexagrammos species are usually brownish in color and patterned with all sorts of colored, dark or light spots or points.
Way of life
Hexagrammos species live mainly in shallow water below the intertidal zone on rocks and on seabeds overgrown by algae or perch. Some species go to depths of 600 meters. They feed on polystyrene , crustaceans, mussels, snails and small fish. During the breeding season, the males form territories. The spawn, deposited in a ball and attached to a substrate, is guarded by the male.
species
- Subgenus Agrammus
- Hexagrammos agrammus ( Temminck & Schlegel , 1843) .
- Subgenus Hexagrammos
- Green kelp ( Hexagrammos decagrammus ) ( Pallas , 1810) .
- Hexagrammos lagocephalus (Pallas, 1810) .
- Hexagrammos octogrammus (Pallas, 1814) .
- Hexagrammos otakii ( Jordan & Starks, 1895)
- White-spotted green compact ( Hexagrammos stelleri ) (Tilesius, 1810)
literature
- Joseph S. Nelson : Fishes of the World , John Wiley & Sons, 2006, ISBN 0-471-25031-7 .
- Eschmeyer, Herald, Hamann: Pacific Coast Fishes , Peterson Field Guides, ISBN 0-395-33188-9 .
Web links
- Hexagrammos on Fishbase.org (English)