Grunt
| Grunt | ||||||||||||
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Grunts ( Rhamphocottus richardsonii ) |
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| Systematics | ||||||||||||
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| Scientific name of the genus | ||||||||||||
| Rhamphocottus | ||||||||||||
| Günther , 1874 | ||||||||||||
| Scientific name of the species | ||||||||||||
| Rhamphocottus richardsonii | ||||||||||||
| Günther, 1874 |
The Grunzgroppe ( Rhamphocottus richardsonii ) is a small fish from the group of bull relatives (Cottales). It lives in the northern Pacific , from Japan , across Alaska , along the east coast of North America to the Santa Monica Bay in southern California.
features
The Grunzgroppe is only eight to nine centimeters long, with the wide, sharp-mouthed head making up a third of the body length. The animals have seven to eight hard and 12 to 13 soft rays in the dorsal fin , the anal fin has only six to seven soft rays, hard rays are missing. The caudal fin is rounded. The pectoral fins are supported by one hard and three to four soft rays. The lower rays of the pelvic fins are free, thickened and not connected by a membrane. Similar to the gurnard , the grunt uses them to run across the sea floor. All fin rays are undivided. A swim bladder is missing. The lateral line organ is incomplete.
Way of life
The Grunzgroppe lives on rock and sand, in the south of its distribution area the fish prefers deeper, cool water down to a depth of 200 meters. The animals hide in empty mussel shells and in discarded bottles and cans. They feed on zooplankton , fish larvae and small crustaceans.
literature
- Joseph S. Nelson : Fishes of the World. Wiley, New York 2006, ISBN 0-471-25031-7 .
Web links
- Rhamphocottus richardsonii on Fishbase.org (English)
- Rhamphocottidae on Fishbase.org (English)