ClingfishesGobiesocidae

Clingfishes (Gobiesocidae) are small, scaleless fishes with torpedo-shaped or dorsally compressed bodies, typically measuring 2-7 cm (0.8-2.8 in) in total length. Their most distinctive feature is a large, prominent sucking disc on the chest, formed from modified pelvic fins, which allows them to adhere firmly to surfaces. Body coloration is variable, ranging from cryptic browns, greens, and greys, often matching their surroundings, to brighter reds or patterns.

Members of this family inhabit shallow reef crests, rocky shores, and seagrass beds, found from the intertidal zone down to approximately 30 m (100 ft). Many species are highly cryptic, remaining largely sedentary and clinging steadfastly to their chosen substrate, even in strong currents. They are often found concealed on the underside of rocks, among algae, or within the spines of sea urchins. Clingfishes are primarily opportunistic feeders, preying on small benthic invertebrates.