Thai River Sprat

The Thai river sprat (Clupeichthys aesarnensis) is a species of herring belonging to the family Ehiravidae, endemic to the Mekong basin in the Indochina region.

This is a small, slender, and elongated fish with a transparent body. The lips bear flat jaws with very small, curved teeth. The scales are thin and easily shed. The anal fin is divided into two sections, with the posterior portion forming a small separate lobe. The body is translucent with a pale yellow tint and a silver stripe running along the midline. The head is slightly darker, with a light greenish hue. Individuals typically reach a body length of about 4 cm (40.0 mm), with the largest specimens measuring up to 6 cm (60.0 mm).