(Ompok bimaculatus)
Ompok bimaculatus, known as butter catfish, is a species of sheatfishes native to Asian countries such as Bangladesh, India, Pakistan, and Sri Lanka, but recently identified in Myanmar. Known in Thailand as pla cha-on (ปลาชะโอน), it is one of the very similar catfish species known in the markets as pla nuea on (วงศ์ปลาเนื้ออ่อน). It is valued for its delicate flesh and is also used for making high-quality fish balls.