Carinotetraodon irrubesco, known commonly as the red-tail dwarf puffer, is a freshwater pufferfish found only in the lower Banyuasin basin in South Sumatra and the Sambas River in West Kalimantan.

[1] They live in murky, acidic water amongst submerged vegetation alongside rasboras, pipefish, halfbeaks, and gobies.

[2] Males are larger and coloured brown with creamy stripes on the flanks and dorsal surface, females are smaller and mottled brown in colour with irregular markings on the ventral surface.

[3] It is important that the C.irrubesco is given the provision of a very soft, fine sand substrate - at least 2cm deep (0.79 inches) - so the fish is able to wallow.

They best thrive in heavily planted tanks providing much soft leafy coverage.