Gitchak nakana-The first aquifer-dwelling fish recorded from Northeast India

A team of ichthyologists from Europe, America and India has discovered Gitchak nakana, the first aquifer-dwelling (phreatobitic) fish recorded from Northeast India. The finding marks the first report of previously unknown subterranean fauna from this part of Asia.

The discovery was published on February 26 in the Nature Portfolio journal Scientific Reports.

Key Features of the Species

• The fish represents a new genus and species.
• It is highly unusual because of the complete absence of a skull roof, with its brain covered only by skin.
• The species is blind, lacking eyes, and displays traits typical of subterranean life, known as troglomorphies.

Among the more than 300 known subterranean fish species worldwide, fewer than 10% have been found in aquifers, making such discoveries extremely rare.

Where It Was Found

The blind loach was discovered in a dug-out well in Assam. Its genus name comes from the Garo word gitchak meaning “red,” referring to its striking red colour, while nakana combines Garo words for “fish” and “blind,” highlighting the absence of eyes.

Scientific Significance

Researchers say the discovery highlights the hidden biodiversity of underground ecosystems in Northeast India and underscores the need for conservation of aquifers and groundwater habitats.

Source: HT