Bangkok river sprat
soft rays: 16 - 27. Body moderately elongate, belly keeled, with 10 to 12 + 6 to 8 (usually 11 + 7) scutes. Teeth minute or absent in jaws; second supra-maxilla at least as long as maxilla blade. Last two anal fin rays forming a separate finlet as in Clupeichthys whose jaw teeth are prominent and present on sides of lower jaw. Resembles C. soborna, which has fewer gill rakers, but more pre-dorsal bones.