Lesser Spotted Dogfish
The lesser spotted dogfish — known to most Irish shore anglers simply as "the doggie" or LSD — is the most reliably caught sea fish from Irish beaches and boats.
A small shark present around the entire Irish coastline year-round, it keeps rods bending when other species go quiet, making it genuinely useful for beginners and a staple of competition catches alike.
Scientific Name: Scyliorhinus canicula
Also known as Doggie, LSD, Rough Hound, Dog, Small Spotted Catshark, Catsúileach Ballach, Fíogach Beag
- Sandy brown to grey-brown body covered in numerous small dark spots; fish from heavily weeded ground can be much darker, occasionally near-black.
- Skin is extremely rough — like coarse wet sandpaper — a reliable tactile ID feature; always wet your hands before handling to avoid abrasion.
- Two dorsal fins set well back toward the tail; nasal flaps meet at the mouth (unlike the bull huss, where they are separate — the key field mark between the two species).
- Typical length 40–65 cm; females slightly larger than males. Irish record 4 lb 4 oz; specimen threshold 3 lb 4 oz.
What to know
Habitat Distribution
- Native to Irish waters; found all around the Irish coastline from inshore shallows down to considerable depth, across every coastal county.
- Tolerates a wide range of bottom types — clean sand, mixed shingle, broken reef, kelp and rock — which explains its near-universal presence wherever shore anglers fish.
- Egg cases (mermaid's purses) are regularly found washed up on Irish beaches, confirming breeding populations in coastal waters nationwide.
- Classified as "least concern" in Irish waters by the NPWS; not targeted commercially due to its tough skin.
Key Locations
- Cork Harbour, Cobh, Crosshaven, and Courtmacsherry — consistently among the most productive marks in the south, with fish reported through much of the year.
- Dunmore East, Kilmore Quay, and Union Hall — well-established southern venues where specimen-sized fish have been recorded.
- Kenmare Bay — produced the Irish record and remains a reliable mark for larger fish.
- Wicklow coast (Kilcoole Beach, Brittas Bay, The Murrough, Greystones South Beach) — year-round shore fishing with autumn night sessions particularly productive.
- North and northeast coast: Downings, Ballycastle, Larne, Donaghadee, Red Bay, and Carnlough all have records of specimen fish.
Specific Spots
- Sandy or mixed sand-and-shingle beaches: dogfish patrol the bottom searching for scent, so any flat ground with tidal movement will hold them.
- Reef edges and kelp beds: fish move into rougher ground at night to hunt; rock marks with at least a few metres of water close in are productive after dark.
- Harbour walls and piers: the scent trail from bait carries well in slack water around structures, drawing fish in even on calm nights.
- Night sessions on the ebb tide consistently produce more fish than daytime — they feed more actively in low light across most Irish marks.
Lesser Spotted Dogfish FAQ
Answers from onWater's species guide.
What are the best lures and bait for Lesser Spotted Dogfish?
Mackerel strip is the go-to bait across Ireland, cut into finger-sized pieces rather than large chunks to improve hook-up rate on smaller fish.
When is the best time to fish for Lesser Spotted Dogfish?
Year-round: dogfish are catchable from Irish shores and boats in every month, making them uniquely reliable when other species are absent. February to June: historically the peak reporting period from Irish angling records, with Cork Harbour and south-coast marks particularly active.
How do you catch Lesser Spotted Dogfish?
Most Irish anglers fish for dogfish from the shore using a simple running leger or paternoster rig baited with mackerel, ragworm, or sandeel, casting to sandy or mixed ground. Night sessions on the ebb tide produce the most consistent results.
What do Lesser Spotted Dogfish eat?
Bottom-dwelling invertebrates and small fish, worms, crustaceans, sandeels, and dead or dying fish, located almost entirely by scent. This is why oily, strong-smelling baits outperform everything else.
Where do Lesser Spotted Dogfish live?
Native to Irish waters; found all around the Irish coastline from inshore shallows down to considerable depth, across every coastal county. Tolerates a wide range of bottom types, clean sand, mixed shingle, broken reef, kelp and rock, which explains its near-universal presence wherever shore anglers fish.
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