Amblyceps carinatum is a species of catfish

Catfish

Catfishes are a diverse group of ray-finned fish. Named for their prominent barbels, which resemble a cat's whiskers, catfish range in size and behavior from the heaviest and longest, the Mekong giant catfish from Southeast Asia and the second longest, the wels catfish of Eurasia, to detritivores...

 belonging to the family Amblycipitidae

Amblycipitidae

Amblycipitidae is a family of catfishes, commonly known as torrent catfishes. It includes three genera, Amblyceps, Liobagrus, and Xiurenbagrus.-Taxonomy:...

. It is only known from the middle part of the Ayeyarwady River

Ayeyarwady River

The Irrawaddy River or Ayeyarwady River is a river that flows from north to south through Burma . It is the country's largest river and most important commercial waterway. Originating from the confluence of the N'mai and Mali rivers, it flows relatively straight North-South before emptying through...

 basin

Drainage basin

A drainage basin is an extent or an area of land where surface water from rain and melting snow or ice converges to a single point, usually the exit of the basin, where the waters join another waterbody, such as a river, lake, reservoir, estuary, wetland, sea, or ocean...

 in Myanmar

Myanmar

Burma , officially the Republic of the Union of Myanmar , is a country in Southeast Asia. Burma is bordered by China on the northeast, Laos on the east, Thailand on the southeast, Bangladesh on the west, India on the northwest, the Bay of Bengal to the southwest, and the Andaman Sea on the south....

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This is a small catfish (up to 36 mm standard length

Fish measurement

Fish measurement refers to the measuring of the length of individual fish and of various parts of their anatomy. These data are used in many areas of ichthyology, including taxonomy and fisheries biology.-Overall length:...

) found in fast flowing streams. The main characteristic which distinguishes it from its congeners is the shape of the adipose fin: In A. carinatum it takes the form of a long low ridge starting just behind the dorsal fin

Dorsal fin

A dorsal fin is a fin located on the backs of various unrelated marine and freshwater vertebrates, including most fishes, marine mammals , and the ichthyosaurs...

 whilst in all other Amblyceps

Amblyceps

Amblyceps is a genus of catfishes of the family Amblycipitidae.-Phylogeny:The genera Amblyceps and Liobagrus are sister group pair that is, in turn, sister to Xiurenbagrus.-Distribution and habitat:...

spp it is blade-shaped and starts well behind the dorsal.