''Cherublemma emmelas'', the black brotula, is a species of cusk-eel found along the Pacific coast of

Central Central is an adjective usually referring to being in the center of some place or (mathematical) object. Central may also refer to: Directions and generalised locations * Central Africa, a region in the centre of Africa continent, also known as ...

and South America from Baja California to Chile. It occurs at depths of from . This species grows to a length of SL. It is the only known member of its genus. Many have been found living close to either soft sediments or rocky bottoms in the broad oxygen minimum zone of the Gulf of California, where by unknown means they thrive in conditions with

partial pressure In a mixture of gases, each constituent gas has a partial pressure which is the notional pressure of that constituent gas as if it alone occupied the entire volume of the original mixture at the same temperature. The total pressure of an ideal gas ...

s of oxygen ranging from 0.1 to 0.15 kPa, which had formerly been assumed to be lethal for any species of fish.

References

Ophidiidae Monotypic fish genera Fish described in 1890 {{Ophidiidae-stub