About Glyptothorax sentimereni and Oreichthys elianae:
- They are two new species of freshwater fish.
- They were discovered during ichthyological surveys in tributaries of the Brahmaputra River in the Mokokchung district, Nagaland.
- Glyptothorax sentimereni:
- It was discovered in the rocky stretches of the Dikhu River.
- It belongs to a group of torrent-dwelling catfishes known for their ability to cling to fast-flowing streams.
- It possesses a specialised adhesive structure on its underside that helps it cling to rocks in strong currents.
- It also possesses serrations on its dorsal-fin spine and a plicate (folded) ventral surface on its pectoral and pelvic fins — features that separate it from closely related species across the Ganges–Brahmaputra–Meghna basin.
- Oreichthys elianae:
- It was found in a tributary of the Tsurang River.
- The fish is distinguished by its bright red fins and a prominent black blotch at the base of its tail.
