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Eel-tailed catfish

Feeding Your Fish Tips: Do not overfeed your fish. Try for two small feedings per day instead of one large feeding. Give your fish a small pinch of food and see if they eat it all within a minute or two. If you see flakes floating to the bottom of the tank, then you put in too much food. That is, unless you have bottom feeders. Overfeeding will lead to poor aquarium water quality and will increase the stress levels in your fish.
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The eel-tailed catfish, Tandanus tandanus, is a species of catfish (order Siluriformes) of the family Plotosidae.[1] This fish is also known as dewfish, freshwater catfish, jewfish, and tandan.[2]

This species is a freshwater fish native to the Murray-Darling river system of eastern Australia.[1] The scientific name for eel-tailed catfish comes from an aboriginal name for the fish – Tandan – which Major Mitchell recorded on his 1832 expedition.[3]

Eel-tailed catfish commonly grow to about 50.0 centimetres (19.7 in) and weigh about 1.8 kilograms (4.0 lb).[4] Fish of this species may grow up to about 90.0 cm (35.4 in) and weigh up to 6.0 kg (13.2 lb).[3] Eel-tailed catfish may live up to about 8 years.[3]

Eel-tailed catfish have large head with thick and fleshy lips and tubular nostrils.[3] The skin is tough and smooth. Body coloration in adults vary from olive-green to brown, black or purplish on their backs and white on the underside.[3] A downturned mouth with fleshy lips surrounded by a number of barbels assist them with feeding. They are a solid, almost cylindrical, elongate fish, with the posterior half of their body tapering into a pointed eel-like tail. A continuous fin margin surrounds this tapering posterior half of the body. Their eyes are small.

The eel-tailed catfish inhabits slow moving streams, lakes and ponds with fringing vegetation. It swims close to the sand or gravel bottoms. This species is more abundant in lakes than in flowing water.[3] Though they are usually solitary, juveniles may form aggregations.[3] The eel-tailed catfish is found in most freshwater habitats of the Murray-Darling river system except for the upland, sub-alpine and alpine headwaters of southern tributaries. It is also present in speciated but undescribed forms in several east coast systems in northern New South Wales due to natural river capture events.[citation needed]