Dwarf butter

Dwarf butter
Dwarf butter ( Phrynorhombus norvegicus )
Systematics
Carangaria Order : Carangiformes Partial order : Flatfish (Pleuronectoideo) Family : Turbot (Scophthalmidae) Genre : Phrynorhombus Type : Dwarf butter
Scientific name of the  genus
Phrynorhombus
Günther , 1862
Scientific name of the  species
Phrynorhombus norvegicus
(Günther, 1862)

The Norwegian topknot ( Phrynorhombus norvegicus , Syn. : Zeugopterus norvegicus ) is a fish of the family of turbot and one of the smallest flatfish Europe.

features

The dwarf butt only reaches a maximum length of 12 cm. The left side is the eye side. It is usually brown in color with crescent-shaped dark and yellow-red spots. The blind side is white. Both sides are covered with distinct coarse scales. The fish looks oval lying on the bottom.

distribution

This species lives in eastern parts of the Atlantic Ocean and adjacent areas of the Arctic Ocean to Murmansk . To the south the distribution area extends over Iceland , the British Isles , the Faroe Islands , Norway's coast and over the North Sea to the Bay of Biscay . Migrating specimens reach the Skagerrak and the Kattegat .

Way of life

The dwarf butter usually stays on the seabed up to 200 m depth and prefers stony soils. Its diet consists of worms, crabs and small fish.

The females lay their eggs, about one millimeter in size, in pelagial sea ​​areas in spring or summer . The fry hatch after about a week and live in the same sea zone until they are 12 to 15 mm long.

Individual evidence

1. ↑ ^{a b c d} Lars Nielsen: Våra fiskar . Prisma, Stockholm 2006, ISBN 91-518-4572-5 , p. 206 (Swedish).
2. ↑ ^{a b} Picton, BE & Morrow, CC: Phrynorhombus norvegicus (Gunther, 1862) Norwegian Topknot. Marine Life Encyclopedia - National Museums of Northern Ireland, 2007, accessed August 26, 2010 . 
3. ↑ ^{a b} dwarf butter on Fishbase.org (English)
4. ^ Bent J. Muus, Jørgen G. Nielsen: Havsfisk och fiske i Nordvästeuropa . Prisma, Stockholm 1999, ISBN 91-518-3505-3 , pp. 255-256 (Swedish).