Round skate
Rajella fyllae
A small skate of the cold, dark sea floor. It lives far below where visitors swim, and no meeting is ever a promise.
Least Concern (IUCN, assessed 2019) means it is not currently close to being threatened.
Length
Up to about 60 cm (24 in); Canadian data give 53 cm (21 in), and trawl catches off Norway ranged from 8 to 57 cm (3 to 22 in)
Weight
Not given in the sources I read
Next to a person
About as long as an adult's arm, with a long thin tail
What it eats
Small bottom-living animals, mainly copepods, amphipods and mysids. A Canadian summary says it apparently preys on small crustaceans.
Around people
Rarely seen, deep water
How it lives
A bottom-dweller of cold water on the deeper shelf and slope, found at 147 to 2,055 m and usually at 300 to 800 m, in water of about 3 to 5.5 degrees C. It lays eggs in horned capsules about 3.8 to 4.2 cm long on sandy or muddy sea floor. Newborns are about 7 to 11 cm long. Fisheries Canada lists its life history as unknown, and I found no figure for lifespan.
Where it goes
Movements are not described in the sources I read. It lives on the deep sea floor, far below the depth recreational divers reach.
We only draw a journey on the map when scientists have tracked it or clearly documented it. For this animal we have not found one yet.
Populations
Least Concern (IUCN, assessed 2019). It is taken at low levels as bycatch in bottom trawl and longline fisheries and is not economically important in Canada, where it is rarely caught. Off Norway it turned up in about 13 percent of 5,005 trawl hauls, most often between 70 and 74 degrees north. I did not find a population count. It occurs in the North Atlantic and Arctic, from west Greenland and Nova Scotia to Iceland, Norway and the Barents Sea.
Meet it respectfully
This skate lives mostly deeper than 300 m, so a meeting on a visit is very unlikely. On any boat trip, never chase, touch, feed or bait marine animals, and follow local rules and your guide.
Fun fact
Tap the bulb to light it up.
Its scientific name honours HDMS Fylla, the Danish ship from whose expeditions to Greenland in 1884 and 1886 the first specimen came.
Its egg capsules have stiff pointed horns at the corners.
Thorn-like spines run along the middle of its back, and more thorns develop with age, especially in females.
Round skate in the Ocean Atlas
Places we have researched where this animal is recorded. It is never guaranteed, and some places are for watching from the boat only.
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Sources for this page
- Wikipedia, Rajella fyllae, 2026
- FishBase, 2026
- Fisheries and Oceans Canada, 2026
- Delaval et al., 2025, ICES Journal of Marine Science
- GBIF (IUCN Red List category), 2026
Facts checked 5 October 2026. Photos: Unsplash licence, or Creative Commons as shown on each photo.
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