The fish show little diversity with only three species commonly occurring in all forest streams. All these species are endemic to the island.

The Comb-tail (Belontia signata) with red tinted fins and tail is found slow moving streams.

The Stone-sucker (Garra lamata ceylonensis) is found clinging to rocks where if feeds on moss

The striped loach (Neomachilus notostigma) is found among the leaf little at the bottom of streams.