''Phallostethus cuulong'' is a species of fish in the family

Phallostethidae Phallostethidae, also known as priapium fish, is a family of atheriniform fish native to freshwater and brackish habitats in southeast Asia. They are small, no more than in length, with partially translucent bodies. They are found in fresh and ...

. It was discovered in 2009 and described in 2012. This species is found at depths of in tidal canals on the

Mekong Delta The Mekong Delta ( or simply ), also known as the Western Region () or South-western region (), is the list of regions of Vietnam, region in southwestern Vietnam where the Mekong, Mekong River River delta, approaches and empties into the sea th ...

. This species attains about in

standard length Fish measurement is the measuring of individual fish and various parts of fish anatomy, their anatomies, for data used in many areas of ichthyology, including Taxonomy (biology), taxonomy and fishery biology. Overall length Standard length (SL) is ...

and is translucent white. Males have their gonads under the chin – along with a serrated saw and rod for grasping females. The name ''cuulong'' is from the Vietnamese name of the river system where they are found, '' Cửu Long River''.

References

External links

Un poisson qui porte ses organes génitaux sous la tête', in French
YouTube
Zoologger: The fish with its genitals on its head
Michael Marshall, New Scientist, 17:35 5/7/2012
The fish with its genitals on its head
11/7/2012, 17:35: NewScientist * cuulong 2012 in Vietnam Fish described in 2012 Mekong Delta Fish of the Mekong Basin Fish of Vietnam Endemic fauna of Vietnam {{Atheriniformes-stub