Indian Salmon (Polynemus indicus)
Indian Salmon (Polydactylus indicus), also known as Threadfin Salmon or Indian Threadfin, is a marine fish species belonging to the family Polynemidae. It is native to the coastal waters of the Indian Ocean, including the Arabian Sea and the Bay of Bengal. The Indian Salmon is a popular food fish and is of significant commercial value in the region.
Physical Characteristics: Indian Salmon has a moderately elongated, compressed body with a deeply forked tail. The fish is characterized by its distinct pectoral fins, which have long thread-like rays that extend beyond the fin membrane. These filaments are used as sensory organs to detect movement and vibrations in the water. The fish’s body color ranges from silvery to bluish-grey, with a pale underside. Indian Salmon can grow up to 65 cm in length and weigh around 5 kg, although most individuals are smaller.
Habitat and Distribution: Indian Salmon can be found in coastal waters, estuaries, and occasionally in rivers along the coasts of the Indian subcontinent, Southeast Asia, and Indonesia. The fish prefers sandy or muddy bottoms and is generally found at depths of 10 to 90 meters.
Diet and Behavior: Indian Salmon is a carnivorous species, primarily feeding on small fish, crustaceans, and cephalopods. It is a bottom-dwelling fish that uses its thread-like pectoral filaments to detect prey hiding in the sand or mud.
Reproduction: Little is known about the specific reproductive behavior of Indian Salmon. However, like many marine fish species, they are thought to reproduce through external fertilization, where the female releases eggs into the water column to be fertilized by the male.
Economic Importance: Indian Salmon is a commercially important fish in the Indian subcontinent, Southeast Asia, and Indonesia. It is sought after for its firm, flavorful flesh, which is low in fat and rich in protein. The fish is typically sold fresh, frozen, or dried and salted and is used in various regional dishes, including curries and grilled preparations.
Conservation and Challenges: Indian Salmon faces challenges such as overfishing, habitat degradation, and pollution. To ensure the sustainable management of this species, there is a need to implement regulations and fishing quotas, as well as promote responsible fishing practices. Additionally, efforts should be made to protect and restore the habitats where Indian Salmon is found, ensuring the long-term survival of this valuable fish species.