New Zealand smelt
Encyclopedia
The New Zealand smelt, New Zealand common smelt, or New Zealand cucumber fish, Retropinna retropinna, is a smelt of the family
Family (biology)
In biological classification, family is* a taxonomic rank. Other well-known ranks are life, domain, kingdom, phylum, class, order, genus, and species, with family fitting between order and genus. As for the other well-known ranks, there is the option of an immediately lower rank, indicated by the...

 Retropinnidae
Retropinnidae
Retropinnidae is a family of bony fish that contains the southern hemisphere smelts and graylings. They are quite closely related to the northern smelts , which they greatly resemble, but not to the northern graylings . Species from this family are only found in southeastern Australia and New Zealand...

, found only in New Zealand
New Zealand
New Zealand is an island country in the south-western Pacific Ocean comprising two main landmasses and numerous smaller islands. The country is situated some east of Australia across the Tasman Sea, and roughly south of the Pacific island nations of New Caledonia, Fiji, and Tonga...

at shallow depths in estuaries and rivers. Their length is between 8 and 13 cm.
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