Indian mackerel, scientifically known as Rastrelliger kanagurta, is a species of mackerel commonly found in the Indian and West Pacific oceans. It is a small-sized fish belonging to the Scombridae family. Here's a detailed description:

Appearance: Indian mackerel typically have a streamlined, elongated body with a slightly forked tail. They have silvery-white underbellies and iridescent blue-green or metallic blue backs with vertical stripes or spots running along their sides.

Size: They are relatively small fish, typically measuring between 20 to 30 centimeters (8 to 12 inches) in length, although some individuals may grow larger.

Habitat: Indian mackerel are primarily found in coastal waters, including estuaries, bays, and along the shores of the Indian Ocean and parts of the West Pacific Ocean. They prefer warm tropical and subtropical waters and are often seen in large schools near the surface.

Diet: They are carnivorous fish, feeding primarily on small fish, crustaceans, and plankton.

Behavior: Indian mackerel are highly migratory and tend to form large schools, especially during spawning season. They are fast swimmers and can travel long distances in search of food and suitable breeding grounds.

Commercial Importance: Indian mackerel is an important commercial fish species, particularly in regions like India, Southeast Asia, and the Middle East. It is caught using various fishing methods, including purse seining, gill netting, and trolling.

Nutritional Value: Indian mackerel is a good source of protein, omega-3 fatty acids, vitamins, and minerals. It is considered a healthy seafood choice due to its nutritional benefits.

Culinary Use: Indian mackerel is popular in various cuisines, often prepared by grilling, frying, or steaming. It has a rich, flavorful taste and firm, oily flesh.