The Danube delta gudgeon (''Romanogobio antipai'') is a species of freshwater

ray-finned fish Actinopterygii (; ), members of which are known as ray-finned fish or actinopterygians, is a class of bony fish that comprise over 50% of living vertebrate species. They are so called because of their lightly built fins made of webbings of sk ...

belonging to the

family Family (from ) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). It forms the basis for social order. Ideally, families offer predictabili ...

Gobionidae Gobioninae is a monophyletic family of Eurasian cyprinoid fishes. This is a species rich clade which, as a subfamily of the Cyprinidae was divided into five tribes: Gobionini, Pseudogobionini, Hemibarbini, Coreiini, and Sarcocheilichthyini. T ...

, the gudgeons. This fish is

endemic Endemism is the state of a species being found only in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also foun ...

to the lower

Danube The Danube ( ; see also #Names and etymology, other names) is the List of rivers of Europe#Longest rivers, second-longest river in Europe, after the Volga in Russia. It flows through Central and Southeastern Europe, from the Black Forest sou ...

in Bulgaria, Romania and Ukraine. It was last recorded in the 1960s, with many studies conducted in its home range, all failing to find the species, until in 2016 a specimen was collected from the Bulgarian sector of the Danube. Named in memory of Romanian zoologist

Grigore Antipa Grigore Antipa (; 27 November 1867 in Botoșani – 9 March 1944 in Bucharest) was a Romanian naturalist, Zoology, zoologist, Ichthyology, ichthyologist, Ecology, ecologist, Oceanography, oceanologist, Darwinism, Darwinist biologist who studie ...

(1867-1944), who collected the type specimen.

References

Romanogobio Fish described in 1953 Taxa named by Petre Mihai Bănărescu {{Gobioninae-stub