Appears to be endemic to southwestern Borneo though occurence
records are scant. The type locality is Bandjarmasin, a port
town in the Indonesian province of Kalimantan Selatan (South
Kalimantan), and following Kottelat (1991) it’s range extends
westwards as far as the Jelai Bila river basin, near the town of
Sukamara, where it’s said to occur sympatrically with the
congener B. merah. Inhabits black water streams and pools
associated with ancient forest peat swamps. The water is stained
brown due to the release of tannins and other chemicals released
by decomposing organic matter and the substrate scattered with
fallen leaves, twigs and branches. Such environments
characteristically contain very soft (negligible hardness),
acidic (pH as low as 4.0) water and are often dimly-lit due to
the forest canopy above and dense marginal vegetation. Across
much of Southeast Asia these precious biotopes are under threat
from rubber/palm oil plantations, building developments and
other human activities. Maximum Standard L