Ilisha elongata

Elongate ilisha

Ilisha elongata is a species of fish in the family Pristigasteridae, commonly known as the elongate ilisha. It is found in marine, brackish, and fresh waters of the Indo-Pacific region, ranging from the east coast of Africa, through the coasts of India and Southeast Asia, to the northern parts of Australia. This species is of moderate importance to local fisheries and is known for its distinct elongated body shape, which differentiates it from other members of the genus Ilisha.

Description

Ilisha elongata can be identified by its elongated body, which is more slender and longer than that of its congeners. The fish typically reaches a length of 20 cm, but can grow up to 30 cm in some cases. It has a silver coloration with a slightly darker back and a light underside, making it well-adapted to its pelagic life. The species has a large mouth equipped with sharp teeth, allowing it to feed efficiently on small plankton and fish larvae.

Habitat and Distribution

The habitat of Ilisha elongata is varied, as the species is adaptable to both freshwater and marine environments. It is predominantly found in coastal areas, estuaries, and river mouths, where salinity levels can vary. The fish prefers turbid waters, which offer abundant food sources and protection from predators.

Its distribution spans a wide geographical area in the Indo-Pacific region. In Africa, it is found from the Red Sea and along the East African coast to South Africa. In Asia, its range extends from the Arabian Sea, through the coastal waters of India and Southeast Asia, to the northern coasts of Australia.

Ecology

Ilisha elongata plays a significant role in its ecosystem as both a predator and prey. It feeds on a diet of plankton and small fish, contributing to the control of these populations. The species, in turn, serves as a food source for larger predators, including birds, larger fish, and humans.

The reproductive habits of Ilisha elongata are not well-documented, but like many fish species, it is believed to spawn in estuarine areas, where the larvae can find abundant food and shelter. The juveniles gradually move to more saline waters as they mature.

Fisheries and Conservation

While Ilisha elongata is not considered a major commercial species, it is caught in artisanal fisheries and is a popular food fish in some regions within its range. It is typically caught using nets and is sold fresh in local markets.

There are currently no specific conservation measures in place for Ilisha elongata, and its population status is not well-known. However, like many coastal and estuarine species, it is likely to be affected by habitat degradation, pollution, and overfishing in some areas. Efforts to monitor and manage its populations are important to ensure its sustainability.

See Also

• Pristigasteridae
• Fisheries
• Ecosystem
• Conservation status

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