Witch Flounder
The witch is a deep-water flatfish found all around the British Isles, living on muddy and sandy seabeds from around 20 metres down to well over a thousand. Shore catches are genuinely rare — there's a UK shore record, but it's a curiosity.
Most encounters come as bycatch in commercial trawls. Boat anglers fishing deep marks occasionally pick one up, making it a notable oddity rather than a target species.
Scientific Name: Glyptocephalus cynoglossus
Also known as Torbay Sole, Grey Sole, Craig Fluke, Witch Flounder, Grey Flounder, Pole Flounder
- Right-eyed flatfish with a noticeably elongated, narrow oval body — slimmer and more eel-like than a plaice or dab, roughly 2.5–3.5 times longer than it is broad.
- Grayish-brown to greenish-grey on the eyed side; pale to white underneath. The pectoral fin on the eyed side darkens noticeably toward black at the tip — a useful ID feature.
- Small head (about one-fifth of total body length), small mouth, and large prominent eyes. The lateral line runs completely straight along the body, unlike the curved line on a plaice.
- Typical catches run well under 2 lb; the UK shore record stands at 1 lb 2 oz. Fish can reach around 2 ft and up to roughly 4–5 lb, but anything over 2 lb from UK waters is exceptional.
What to know
Habitat Distribution
- Native to the North Atlantic; present all around the British Isles and northward into the Barents Sea. A cold-water species whose range barely extends south of the English Channel.
- Lives on soft muddy and sandy seabeds, typically between 45 and 366 metres, though recorded as deep as 1,570 metres. Rarely found in the shallower inshore ground most UK boat anglers work.
- Cornish ports record commercial landings, and the species is taken by demersal and beam trawlers operating in deeper offshore grounds around England, Scotland, and Wales.
Key Locations
- Cornish offshore grounds — Cornish ports recorded commercial landings in 2024, indicating the species is present in deeper southwest waters.
- Deep offshore marks around the British Isles generally, particularly where soft muddy seabed extends beyond 50 metres.
Specific Spots
- Deep muddy or sandy bottom well offshore — the witch hugs soft substrate and is almost never found over hard or rocky ground.
- From a boat, deeper channel edges and offshore banks where the bottom transitions from sand to mud are the most likely places to encounter one incidentally.
- Shore fishing for witch is largely theoretical; the UK shore record exists, but the species' preference for deep water puts it out of practical casting range in almost all situations.
Witch Flounder FAQ
Answers from onWater's species guide.
What are the best lures and bait for Witch Flounder?
Black lugworm, common lugworm, white ragworm, and mussel are the most effective baits on soft-bottom deep marks, these match the invertebrate prey the witch feeds on naturally. Mackerel strip works as a scent bait on deep muddy ground. Keep bait sections small to suit the witch's small mouth.
When is the best time to fish for Witch Flounder?
No defined UK sport season exists. Commercial landings suggest year-round availability in deep water. The britishseafishing.co.uk source notes witch are caught January–March and August–December, with April–July less productive, possibly reflecting spawning behaviour or depth distribution shifts in summer.
How do you catch Witch Flounder?
Witch are almost never deliberately targeted by UK anglers. Boat anglers fishing deep offshore marks for mixed flatfish or whitefish occasionally pick one up on worm or mussel baits presented on a flowing trace close to the seabed.
What do Witch Flounder eat?
Feeds on crustaceans, worms, brittle stars, starfish, and small marine invertebrates along the seabed. The small mouth limits prey size, so fine-tipped baits like ragworm, lugworm, and mussel strips are the closest practical match for anyone targeting flatfish on similar ground.
Where do Witch Flounder live?
Native to the North Atlantic; present all around the British Isles and northward into the Barents Sea. A cold-water species whose range barely extends south of the English Channel. Lives on soft muddy and sandy seabeds, typically between 45 and 366 metres, though recorded as deep as 1,570 metres.
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