Helostoma temminckii, commonly known as the kissing gourami, is a freshwater fish native to Southeast Asia. It is recognized for its unique 'kissing' behavior, which is actually a form of social interaction or territorial dispute. The species has a laterally compressed body and can be found in slow-moving rivers and swamps. It plays a role in its ecosystem by feeding on algae and small invertebrates.

Helostoma temminckii, commonly known as the kissing gourami, is native to Southeast Asia. Its geographical distribution includes Thailand, Malaysia, Indonesia, Cambodia, and Vietnam. The species is primarily found in the Mekong and Chao Phraya river basins, as well as in other smaller river systems and floodplains across this region.

The kissing gourami typically inhabits slow-moving or stagnant waters such as lakes, marshes, and swamps, as well as lowland rivers. The environmental conditions in these habitats include warm tropical climates with temperatures ranging between 22 to 28 degrees Celsius (72 to 82 degrees Fahrenheit). The water bodies often have dense vegetation and soft, muddy substrates.

Helostoma temminckii occupies an ecological niche as both a herbivore and detritivore, feeding on algae, plankton, and detritus found on submerged surfaces and plants. Its specialized mouth structure allows it to scrape algae from rocks and plants, contributing to its role in controlling algal growth in its habitat.