Nematalosa nasus

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Nematalosa nasus is a species of ray-finned fish in the family Clupeidae. It is commonly known as the Bloch's gizzard shad or simply gizzard shad. This species is found in the Indo-Pacific region, particularly in the coastal waters of the Indian Ocean and the western Pacific Ocean.

Description

Nematalosa nasus has a deep, laterally compressed body typical of the Clupeidae family. The fish is characterized by a prominent, elongated snout and a distinctive gizzard-like stomach, which is used to grind up food. The body is covered with large, deciduous scales, and the coloration is generally silver with a darker back.

Distribution and Habitat

This species is distributed across the Indo-Pacific region, from the eastern coast of Africa to the waters of Southeast Asia and northern Australia. Nematalosa nasus typically inhabits coastal waters, estuaries, and sometimes enters freshwater rivers.

Diet

Nematalosa nasus primarily feeds on plankton, small crustaceans, and other microscopic organisms. The gizzard-like stomach helps in grinding down the food, which is a unique adaptation among the Clupeidae.

Reproduction

The reproductive habits of Nematalosa nasus are not well-documented, but like other members of the Clupeidae family, it is likely to be an oviparous species, with external fertilization. Spawning usually occurs in shallow coastal waters.

Economic Importance

Nematalosa nasus is of minor commercial importance in some regions. It is often caught using gillnets and is used for local consumption. The fish is also used as bait in some fisheries.

Conservation Status

The conservation status of Nematalosa nasus has not been extensively studied. However, like many coastal species, it may be affected by habitat degradation, overfishing, and pollution.

See Also

• Clupeidae
• Ray-finned fish
• Indo-Pacific
• Plankton