Type specimen of Lesser Loach was taken from the hot springs at the Kinniya. Hence the name thermalis. However it is common in most part of the lowlands up to about 600m altitude. It can be found in sandy slow flowing streams and usually the last survive in the fast drying mud puddles in dry zone streams during the dry season. It is a vegetarian though it is believed that it also feeds on mosquito larva (Deraniyagala P.E.P, 1952).