Red Gurnard

The Red Gurnard (Chelidonichthys cuculus) is a bottom-dwelling marine fish in the family Triglidae, the gurnards or sea robins. It ranges across the northeastern Atlantic and Mediterranean, from Norway to West Africa, typically over sandy, gravel, or mixed seabeds on the continental shelf. Gurnards are easily recognized by their heavily armored, bony heads and the three separate finger-like rays at the base of each pectoral fin, which the fish uses to 'walk' along the bottom and probe sediment for prey. Red Gurnard is a popular species with sea anglers along European coasts. It is not currently considered threatened, though it is caught as both a target and bycatch species in mixed bottom trawl fisheries across its range.

Key features for identifying Red Gurnard:

• Reddish-pink body, paler underneath, growing to roughly 25-40 cm
• Large, bony, ridged head that looks almost helmeted
• Wing-like pectoral fins that are reddish, sometimes with a pale bluish margin
• Three separate, finger-like rays beneath each pectoral fin used for sensing the seabed
• Spiny first dorsal fin and a slender, tapering body toward the tail
• Downturned mouth suited to bottom feeding

It is distinguished from similar gurnards, such as the grey gurnard, by its overall reddish coloration and finer scales; the tub gurnard is larger with brighter blue-spotted pectoral fins.

Red Gurnard lives on the continental shelf of the northeastern Atlantic and Mediterranean, from southern Norway and the British Isles south to Senegal, typically at depths of 10-200 m. It favors sandy, muddy, or gravel bottoms where it can settle and use its sensory pectoral rays to detect buried prey. Juveniles are often found in shallower inshore waters, including estuary mouths, while adults move into slightly deeper water. The species tolerates a range of temperate sea temperatures and is a year-round resident across much of its range, though some populations show seasonal inshore-offshore movements linked to spawning and feeding.

Red Gurnard is a solitary, bottom-dwelling forager rather than a schooling fish. It spends much of its time resting or moving slowly across sediment, using the free rays of its pectoral fins almost like legs to detect buried worms, small crustaceans, and mollusks, then using its protrusible mouth to capture them. It can also produce audible grunting or croaking sounds using muscles associated with its swim bladder, a trait shared with other gurnard species and thought to play a role in communication. Spawning occurs in the warmer months, with pelagic eggs and larvae that drift before juveniles settle to the bottom. As a bottom-shelf predator, it plays a role in controlling invertebrate populations.