Ynghylch

The butterfish is a small eel-like fish found in rockpools and shallow seas all around the UK. They are pretty shy and are normally hidden in crevices or under rocks and seaweed. You might also hear of butterfish being called Gunnels or Rock Gunnels. They feed on anything they can find, including small crustaceans, molluscs and fish eggs. Butterfish lay their eggs on rocky shores, hiding them away from predators in crevices. Unlike in most fish species, both the Mum and the Dad take it in turn to guard their unhatched eggs from hungry predators.