On the other fish the darker ahead remains constant. This fish has eyes on the top and a shape like the Mudskipper species of the tropical mangrove habitats. Their courtship is quite elaborate, which is unusual in British fish. Had the female responded, the courtship would, I am told, have continued with increasing excitement until the two fish swam vertically upwards, undersides together with the female resting on the male's pectoral fins, and released their eggs and sperm to be fertilised between their bodies before it drifted away. Over sand and mud.
Young fish are sand shifters, filtering small organisms from ingested sand.
Adults eat small crustaceans and worms, Carrion probably not an important part of its diet and may not be recognised as food. In captivity, they started feeding on crushed frozen prawn after four days. All British coasts. Shallow water to 30 metres, occasionally deeper. Juveniles intertidal, although all Sussex specimens were found in Autumn, as late as October.