Denison's Barb

The Denison's Barb, widely known as the Rose Line Shark due to the brilliant red stripe running through the eye and along the upper lateral line, is one of the most visually stunning cyprinids in the freshwater hobby. The torpedo-shaped body is gleaming silver-white, bisected by a bold black horizontal stripe from snout to tail, above which runs the vivid crimson-red line that gives the fish its common name. The caudal fin is boldly marked with red and black on the upper lobe and yellow on the lower, completing an extraordinary color combination. Native to the fast-flowing, well-oxygenated hill streams and rivers of Kerala and Karnataka in southern India, the Denison's Barb is an active, powerful swimmer requiring large tanks with good current, high oxygen levels, and relatively cool temperatures. It is listed as vulnerable in the wild due to over-collection and habitat loss, though captive-bred specimens are increasingly available. In the aquarium it is peaceful and suitable for large community setups with robust, similarly sized tankmates. Growing to 15 cm and preferring cooler conditions, it requires a dedicated, well-maintained system.