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Oriental River Goby (introduced)
   
   

Fig 1



 

 

 

 

Order : Perciformes
Family : GOBIIDAE
Species : Rhinogobius giurinus
Maximum Length : 6 cm (possibly to 8 cm).

This tiny goby, a native of Northeast Asia, occurs in freshwater streams and rivers, brackish estuaries and marine environments.

Its body form is elongate and the eyes are moderate in size. Its skin is mottled pale grey and dark grey, however the example in this photo (left) is more reddish-brown perhaps due to the reddish, iron-rich substrate of the stream in which it was found.

The species is omnivorous, feeding on a variety of plant and other organic matter as well as insects, snails and the larvae of crustaceans and other fishes.

The Oriental River Goby occurs mainly in Taiwan and mainland China, Japan and Korea, and is also listed as occurring in Vietnam. In Singapore it is an introduced species in freshwater habitats, and is blamed for out-competing Pseudogobiopsis oligactis, a native freshwater goby, which it may have pushed to local extinction.


Fig 1 : Specimen in a shallow stream, just 10 cm deep, issuing from secondary forest, Singapore.


References : F2