All fish / Danionidae

Shuvolong chain danio

Danio annulosus

Also known as chain danio, annulosus danio, shuvolong danio

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This danio was described in 2015 and belongs to the chain danio group. It is a slim, active fish with dark rings and chain-like markings on a pale body. Hobbyists keep it because it is rare and attractive, and it suits a well-oxygenated stream tank alongside other peaceful fish.

Care at a glance

Care level

Moderate

Temperament

Peaceful

Adult size

6 cm

Temperature

20 to 26 °C

pH

6.5 to 7.5

Smallest tank

100 litres

Keep as

Shoal of 8 or more

Diet

Omnivore: quality flakes and micro pellets, frozen and live bloodworm, daphnia and brine shrimp

Swims

Middle of the tank

Lifespan

3 to 5 years

Water

Freshwater

Wild range

Bangladesh (Shuvolong Falls, Kaptai Lake area, Karnaphuli basin)

Breeding

It is thought to scatter its eggs over gravel or fine-leaved plants and give no parental care, as other danios do. Captive breeding has rarely been recorded, so the best approach is to use a separate tank with a mesh or marble base to protect the eggs from the adults.

Good to know

So far it is known only from one waterfall pool in Bangladesh, so wild fish are very rarely available and it could be confused with Danio dangila or other chain danios. Keep the tank covered because it jumps, and give it strong water flow and plenty of oxygen.