Neyyar basin

Opsarius bakeri is a fast-swimming cyprinid endemic to the Western Ghats of southwestern India, with records from many rivers in Kerala and Karnataka. It is traded as 'royal danio', 'blue-spotted hill trout' and 'blue-dotted mirror fish', and has a single row of bluish-green spots that get smaller with age. Its well-oxygenated, fast-flowing rivers are being polluted and degraded by exotic species and sand mining.

The Cardamom garra (Garra hughi) is a cyprinid from the Anamalai, Cardamom, Palani and Ashambu Hills of the Western Ghats, southern India. It appears occasionally in the ornamental trade, where it may be labelled 'chocolate algae eater'. The flanks are grey and the belly yellowish-white, with a conspicuous dark lateral band running to the caudal-fin base. It inhabits swiftly-flowing headwaters and tributaries.