|Similar Clunio, Fly, Psectrocladius, Orthocladiinae, Metriocnemus|
Clunio marinus is a non-biting midge of the bloodworm family (Chironomidae). It is found in the intertidal zone of the European Atlantic Coast from Spain to Iceland. The species is a long-standing model system in Chronobiology, particularly for circalunar clocks and the evolution of biological clocks. Its genome has been sequenced.