Common Dab

The common dab (Limanda limanda) is a small right-eyed flatfish in the family Pleuronectidae, one of the most abundant flatfish in the shallow shelf seas of northwestern Europe. It is closely related to other members of the genus Limanda and is easily overlooked due to its modest size compared to larger flatfish like plaice or turbot. Common dab range widely across the North Sea, English Channel, Baltic Sea, and along the coasts of the British Isles, Scandinavia, and northern France. The species is abundant and not considered threatened, supporting minor commercial and recreational fisheries alongside its ecological role as a common shelf-sea flatfish.

Common dab can be identified by several distinguishing features among small European flatfish.

• Body: small, oval, moderately flattened
• Eyes: both on the right side
• Coloration: sandy brown upper side with faint darker speckling, plain white underside
• Skin: notably rough and sandpapery to the touch due to small ctenoid scales
• Lateral line: strongly curved above the pectoral fin, a key diagnostic feature
• Size: small, typically 20-30 cm The pronounced curve of the lateral line and rough, gritty skin texture reliably separate the common dab from similarly sized flounder or young plaice, which have smoother skin and a straighter lateral line.

Common dab inhabit sandy seabeds of shallow shelf seas, typically at depths from very shallow nearshore waters down to around 150 m. They are widely distributed across the North Sea, English Channel, Irish Sea, Baltic Sea, and coastal waters of the British Isles, Scandinavia, and northern France, extending into parts of the northeastern Atlantic. They favor clean, well-oxygenated sandy or fine gravel substrates in relatively shallow, cool temperate waters. Juveniles are commonly found in very shallow nearshore areas, including sandy beach zones, while adults may move into slightly deeper offshore waters.

Common dab are active bottom-dwelling feeders, foraging over sandy substrates for small invertebrates such as worms, brittle stars, small crustaceans, and mollusks, often venturing more actively over the seabed than some other flatfish. They are generally solitary but can occur in loose aggregations in areas of abundant food. Common dab are not highly migratory, tending to remain within regional shelf-sea habitats, though some seasonal movement occurs between feeding and spawning areas. Spawning takes place in spring and summer in shallow coastal waters, with females producing numerous small pelagic eggs that drift before larvae settle into nearshore nursery habitats. As one of the most abundant small flatfish in the region, they form an important prey source for larger predatory fish.