The Chief Minister of Sikkim recently released Chocolate Mahseer fish into the Rangeet River, highlighting the importance of conserving indigenous fish species and protecting the state's aquatic biodiversity.
The Chocolate Mahseer, also known as the Copper Mahseer, is a freshwater fish species scientifically known as Neolissochilus hexagonolepis.
Fish species belonging to the genera Tor and Neolissochilus, under the family Cyprinidae, are popularly known as Mahseer.
The Chocolate Mahseer is locally known as ‘Kha Saw’ in Meghalaya. It has been designated as the state fish of Meghalaya and Sikkim.
The Chocolate Mahseer is found in major rivers and hill streams across the northeastern states of Meghalaya, Assam, Arunachal Pradesh, Sikkim, Manipur, Nagaland, Mizoram and Tripura.
The species inhabits clear, fast-flowing streams and rivers with stony, pebbly or rocky riverbeds. These habitats provide suitable conditions for the species to survive and navigate strong water currents.
The Chocolate Mahseer possesses exceptional strength and agility, making it a prized catch among anglers.
Its powerful pectoral and dorsal fins enable it to navigate swiftly against strong river currents.
Females are larger than males of the same age group.
The species is also considered an indicator of healthy river ecosystems, as it is associated with clear, fast-flowing freshwater habitats.
The population of Chocolate Mahseer is declining due to habitat degradation, overfishing and environmental changes. Protecting its natural river habitats and controlling unsustainable fishing are important for its conservation.
The International Union for Conservation of Nature (IUCN) classifies the Chocolate Mahseer as Near Threatened on its Red List.
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