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Wildlife Group: Fish

Shore Clingfish

Lepadogaster lepadogaster

Shore Clingfish use their suction disc to attach firmly to rocks, even in strong currents. Their mottled colouration helps them blend in with algae and coralline encrustations. Around Lihou, a gentle search at low tide may reveal one tucked under a ledge, clinging upside down until the tide returns.

Fifteen-Spined Stickleback (Sea Stickleback)

Spinachia spinachia

This elongated stickleback has a row of small spines along its back, and the males build nests from plant materials, protecting the eggs inside. Around Lihou, you might occasionally spot them in rockpools or among seaweed if you search carefully at low tide. Observing a guarding male offers a fascinating glimpse of parental care in fish.

Sand Smelt (Atherine)

Atherina presbyter

Sand Smelt can be mistaken for small sardines due to their silvery appearance, darting about in quick, flashing groups. They feed on plankton and tiny crustaceans, sometimes gathering in large shoals near shore. Around Lihou, keep an eye on calmer corners of the sea or deeper pools where shimmering schools might suddenly scatter if they sense movement.

Juvenile Wrasse (e.g., Ballan Wrasse, Corkwing Wrasse)

Labrus bergylta (Ballan), Crenilabrus melops (Corkwing)

Young wrasse are lively, inquisitive fish that dart quickly among seaweed and rocks. They eat small crustaceans, molluscs, and barnacles, helping to manage invertebrate numbers. On Lihou, if you examine clear rockpools or shallow kelp stands, you might catch a flash of colour as one zips away to hide under fronds.

Juvenile Pollock

Pollachius pollachius

Pollock start life in coastal rockpools and seaweed beds, hiding from larger predators. As they grow, they venture offshore, eventually reaching lengths over 50 cm in open water. Around Lihou, you may see small, streamlined juveniles darting among kelp fronds at low tide, quickly flicking their forked tails to evade threats.

Giant Goby

Gobius cobitis

Giant Gobies have thick bodies and rounded heads, making them easy to distinguish from smaller gobies. They are rare and protected in some parts of the British Isles, so if you spot one around Lihou, observe it gently and then let it remain undisturbed. Their preference for undisturbed, algae-rich pools means they can be elusive even where they are present.

Common Blenny (Shanny)

Lipophrys pholis

Shannies are curious fish, sometimes peering out from cracks before darting away. They have a surprisingly strong bite for their size, so handling them requires caution. On Lihou’s rocky shores, check deeper pools or shaded ledges at low tide, and you might see one resting among seaweed or eyeing you from its hiding spot.

Rock Goby

Gobius paganellus

This chunky goby, up to about 12 cm, hides in rockpools and crevices, blending with dark seaweed. On Lihou, it is common in pools at low tide and quickly darts away if disturbed. It survives well in shallow water by feeding on tiny crustaceans and worms.

Worm Pipefish

Nerophis lumbriciformis

A relative of seahorses with a thin, elongated body up to 20 cm, the Worm Pipefish lives among seaweed and eelgrass. Around Lihou, it can be found in lower shore pools if you look carefully at fronds and holdfasts. Its tube-like snout helps it suck in tiny crustaceans, while males brood eggs along their belly.

Sand Eel

Ammodytes tobianus

Slender and silvery, this fish (10–20 cm long) can burrow quickly into sandy seabeds to avoid predators. Around Lihou, it forms a vital food source for gulls, shags, and other coastal hunters. Look out for diving seabirds that might signal where sand eels are schooling near the shore.

Seabass

Dicentrarchus labrax

A sleek, silver fish prized by anglers, Seabass often patrols rocky reefs and sandy bays around Lihou. It can surpass 50 cm and is more numerous in warmer months when it hunts shoals of smaller fish. Local regulations frequently apply to its catch, reflecting its popularity and conservation need.

Ballan Wrasse

Labrus bergylta

Ballan Wrasse range in colour from mossy greens to rusty browns, using strong jaws to crush shellfish and control invertebrate populations. They prefer reef structures or kelp stands, where they can shelter and find food. Off Lihou’s coast these fish help to maintain a balanced marine ecosystem.

Tompot Blenny

Parablennius gattorugine

Recognisable by two little “tufts” above its eyes, the Tompot Blenny can reach 20 cm. It usually hides among rocky crevices in deeper rockpools or subtidal zones around Lihou. Tompot Blennys peer out from holes or ledges, waiting for small crustaceans to pass by.

Montagu’s Blenny

Coryphoblennius galerita

This small blenny, usually under 8 cm, has a distinct crest on its head and lives under stones or algae in rockpools. It feeds on tiny invertebrates and blends well with the rocky backdrop.

Dog Fish

Scyliorhinus canicula

Often referred to as the “Lesser Spotted Dogfish,” this small shark, reaching around 60–75 cm, can be found on sandy or gravel bottoms. Egg cases known as “mermaid’s purses” may wash up on Lihou’s beaches. With dark spots sprinkled over a pale background, it blends into the seabed while resting during the day.

Conger Eel

Conger conger

Conger Eels spend their days hidden in crevices or beneath ledges, emerging under cover of darkness to hunt fish and crustaceans. Though they prefer deeper waters, some may venture closer to Lihou’s rocky coastline at high tide and occasionally get stranded in rockpools as the tide goes out again. Their impressive size and heavy build make them one of the largest eels in local seas.

Corkwing Wrasse

Symphodus melops

A smaller, vividly patterned relative of the Ballan Wrasse, Corkwing Wrasse can show blues, greens, or browns along its head and flanks. During the breeding season, males build seaweed nests where the eggs are protected. On Lihou, you might spot one in deeper rockpools or among kelp at low tide, zipping away if disturbed.

Butterfish

Pholis gunnellus

The Butterfish is slippery to the touch, helping it wriggle free if grasped. Those eye-like spots along the dorsal fin may confuse predators into striking the wrong end. On Lihou, gently lifting stones in rockpools near the low tide can reveal one darting off in a flash of silvery brown.

Black Sea Bream

Spondyliosoma cantharus

Black Sea Bream are known to build small nests by clearing patches on the seabed, where they guard their eggs. Around Lihou, they frequent rocky sites in summer, feeding on crustaceans, molluscs, and algae. Anglers sometimes encounter them from shore or by boat, recognising their firm, well-proportioned shape and occasional flashes of colour.

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The Lihou Charity LBG is a Guernsey Registered Company 72028, a Guernsey Registered Charity CH178 and also a member of the Guernsey Association of Charities No. 265.

The Registered Office of the Company is Herston, Les Hubits de Bas, St Martin, Guernsey GY4 6ND