The Long-fin Zebra Danio is a selectively bred fin variety of the Zebrafish (Danio rerio) in which the dorsal, caudal, anal, and pelvic fins are greatly elongated, producing a flowing, veil-tail appearance that gives the fish a more graceful and decorative look than the standard short-finned form. The classic blue and silver horizontal stripe pattern of the Zebrafish is retained and, in fact, appears even more striking when displayed across the extended fin surfaces. In terms of care, biology, and behavior, the Long-fin Zebra Danio is essentially identical to standard Danio rerio: it reaches approximately 5 cm, is entirely peaceful, schooling, and exceptionally hardy. It tolerates a wide range of water conditions and accepts all standard foods. The principal consideration specific to the long-finned variety is fin care: its long, flowing fins are attractive targets for fin-nipping species such as Tiger Barbs or other semi-aggressive fish. Tankmate selection must therefore be made carefully. When kept with appropriate companions, the Long-fin Zebra Danio is a beautiful and trouble-free aquarium resident that has been popular with hobbyists since the development of the variety in the mid-twentieth century.
