Epalzeorhynchos frenatum, commonly known as the Rainbow Shark, is a freshwater fish native to the river basins of Southeast Asia. It features a sleek, torpedo-shaped body with a striking combination of dark gray or black scales and vivid red or orange fins. Known for its territorial behavior, it thrives in well-oxygenated waters with ample hiding spots within its habitat. This species plays a crucial role in controlling algae growth in its ecosystem.

Epalzeorhynchos frenatum, commonly known as the Rainbow Shark, is native to Southeast Asia. Its geographical distribution includes countries such as Thailand, Laos, Cambodia, and Vietnam. It is predominantly found in the Chao Phraya and Mekong river basins.

Rainbow Sharks typically inhabit freshwater environments. Their natural habitat includes rivers, streams, and floodplains with moderate to fast-flowing water. These areas are characterized by a sandy or rocky substrate and abundant plant life, which provides shelter and food.

The Rainbow Shark occupies a benthopelagic niche, meaning it is adapted to living near the bottom of water bodies while also utilizing the middle water column. It is an omnivorous species, feeding on algae, plant matter, and small invertebrates. The species is known for its territorial behavior, especially in confined spaces.