Morphometric and meristic variability in Butis koilomatodon (Gobiiformes: Eleotridae) in estuarine and coastal areas of the Mekong Delta

The study aimed to investigate morphometric and meristic variability in the mud sleeper Butis koilomatodon (Bleeker, 1849) in the Mekong Delta. This species is a commercial fish species with a small-size and is mainly distributed in some coastal areas from Tra Vinh to Ca Mau provinces.