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Rohu Fish: Things You Should Know

The rohu fish is a common, widely grown freshwater fish in South Asia. This carp fish belongs to the family Cyprinidae. Other names for rohu fish include rui fish and Rohit fish. The Rohu fish is the most highly valued species of carp fish. It tastes really good and delicious. People in Bangladesh, India, Nepal, Thailand, Pakistan, and other Asian nations are huge fans of rohu fish. Usually, it’s a river fish. However, it’s also present in every kind of natural water reservoir. Rohu fish farming is very common and lucrative in ponds, meres, or lakes.




Classification of organisms




The order of fish is Cypriniformes





Identification of the species

L. rohita

Scientific name

Laboratoria rohita

Distribution by Region

This fish is frequently found in Pakistan, India, Nepal, Bangladesh, Burma, Thailand, China, Kampuchea, and Sri Lanka.

Physical Characteristics of Rohu Fish

The following describes the physical traits that allow us to identify Rohu fish.
  • Rohu’s body is substantial. However, compared to their body, their head and tail are relatively narrower.
  • Cycloid scales cover their entire body. Excluding the fins and head.
  • The mouth is inferior, and the director is triangulated.
  • The colour of the surface and beneath is brown.
  • The belly is silvery white.
  • Fish called Rohu have two pairs of nostrils.
  • Two lips cover the mouth. A couple of trunks and numerous tiny indentations can be found at the edge of the lips.
  • The caudal fin’s middle region is divided. Thus, the term homocercal.
  • The rohu fish has seven fins total, including odd and even fins.
  • The Rohu is between 90 cm and 1 m long.
  • The scales are evenly spaced and sleek in a row.
  • The rear and front of the head have a blackish hue.
  • The body has a small upward curvature.
  • This fish has about 15–16 cords in its dorsal fins.
  • The body’s scales have a crimson hue. However, the belly scales are a silvery white hue.

Rohu Fish Reproduction process

At three years old, rohu fish typically reach physical maturity. A female Rohu has roughly 0.3 million eggs in her body. When the conditions are right, they lay eggs between April and July. They lay their eggs in open water bodies, such as rivers. These fish minnows can also be created artificially. Rohu fish do not lay eggs in still water.

Aqua Culture of Rohu Fish

In South Asia, Rohu is a significant freshwater species raised for aquaculture. It requires induced spawning because, in lake ecosystems, it does not reproduce when cultured. As a game fish, the Rohu is also highly valued.


Typically, rohu fish meander through the middle of the water column, where they eat. Rui fish primarily consume putrescent organic materials and plants as food. The adult rohu fish eats mostly phytoplankton, while the minnow fish only consumes zooplankton. Fish meal, cake, rice dust, wheat chaff, and other materials can be used as supplemental feed for commercial rohu fish farming.

Care and Shelter

Fish farms are primarily built on land that is unsuitable for agriculture. Some considerations need to be made when setting up a fish farm, such as ensuring the land can hold water and avoiding creating ponds on sandy or loamy soil. If you want to test the ground there, dig a hole one foot deep and wide, then fill it with water. It is suitable for fish farming if water is in the gap for one to two days; otherwise, it is not recommended.
There are primarily three different kinds of pools:

1. Production

2. Rearing

3.Nursery pools

Fertilizer Management

Aquaculture uses primarily organic and inorganic fertilizers.

Inorganic or mineral fertilizers comprise materials derived from agricultural fields and mineral nutrients produced in industries. Most of it contains animal, chicken, and other organic materials. Organic materials like rice bran, sewage, grass, and composts.

Organic fertilizers comprise a blend of organic matter and mineral nutrients. Most locals manufacture it using agricultural and animal waste from farms. At least one of these plant nutrients, such as potassium, phosphorus, or nitrogen, makes up most of it.

Rohu Fish's Nutritional Value

Vitamin A, B, C, and omega-3 fatty acids are abundant in Rohu. It is also high in vitamin D, a nutrient in very few foods. Eating fish can help prevent osteoporosis, a condition caused by a lack of vitamin D.


In addition to the Indian states of Tripura, Nagaland, Bihar, Odisha, Assam, West Bengal, Andhra Pradesh, Tamilnadu, and Uttar Pradesh, rhubarb is consumed widely throughout Bangladesh, Nepal, and Pakistan.

Illnesses and their therapies

Tail and fin rot: This condition manifests as a light white colour at the tip of the fin, which spreads throughout the fin and eventually falls off.

Treatment: A 0.5% solution of copper sulphate is applied. In two to three minutes, the fish drowns in treated water.

Argulosis: The symptoms are slow growth, loose fins, and blood spots on the skin.

Treatment:Add Malathion (50 EC) @1l/acre at intervals of 15 days for three times.



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