Description: The Norwegian topknot is a left-eyed flatfish that is oval in shape and more slender than other topknot species. It is also the smallest of the topknots, reaching a maximum length of 12cm. The background colour is usually brownish with irregular darker and also pink and orange blotches.

Habitat: Like Zeugopterus punctatus this species lives amongst rocks in the shallow subtidal from 5m down to approximately 50m.

Distribution: This species is mostly found on the Atlantic coasts of Britain and Ireland however it has also been recorded from the Calf of Man in the Irish Sea.

Similar Species: This species is sometimes confused with the lemon sole (Microstomus kitt) however the latter is right-eyed. It is also similar to the topknot (Zeugopterus punctatus) and Bloch's topknot (Phrynorhombus regius) but can be distinguished by its more slender appearance, smoother snout and relatively large scales.

Key Identification Features:

• Left-eyed flatfish
• Slim, oval outline
• Large scales
• Lives amongst rocks

Distribution Map from NBN: Phrynorhombus norvegicus at National Biodiversity Network mapping facility, data for UK.

iNaturalist: Phrynorhombus norvegicus at iNaturalist World Species Observations database.

WoRMS: Phrynorhombus norvegicus at World Register of Marine Species. Accepted name: Zeugopterus norvegicus (Günther, 1862). AphiaID: 293018.

Classification: Biota; Animalia; Chordata; Vertebrata; Gnathostomata; Osteichthyes; Actinopterygii; Actinopteri; Teleostei; Pleuronectiformes; Scophthalmidae; Phrynorhombus