Shortfin scad – Decapterus macrosoma

Shortfin scad, Decapterus macrosoma, Decapterus macrosoma
Size: 35 cm
Depth: 20 - 214 m
Water Type: Marine

Decapterus macrosoma is a species of fish belonging to the jack family, Carangidae. Commonly known as the “Big-eye scad”, it is a relatively small but widely distributed fish found in tropical and subtropical waters across the globe.

Description & Characteristics

Decapterus macrosoma is characterized by its elongated, fusiform body, with a slightly compressed profile. The fish possesses a large, prominent eye, hence its common name “Big-eye scad”. It has a relatively small mouth with a sharp, pointed snout. The body is covered in small, smooth scales, with a silvery-grey color dorsally and a paler, silvery-white color ventrally. The dorsal fin consists of two separate parts: a short, spiny anterior portion and a longer, soft-rayed posterior portion. The anal fin is also divided into two parts, with a small, spiny portion followed by a longer, soft-rayed portion. It can reach a maximum size of 35.0 cm in length.

Habitat and Occurrence

Decapterus macrosoma is a pelagic fish, meaning it lives in the open ocean, away from the seabed. It is typically found in waters with depths ranging from 20.0 to 214.0 meters, inhabiting both coastal and offshore areas. Decapterus macrosoma is a common inhabitant of the epipelagic zone, the uppermost layer of the ocean, which is characterized by sunlight penetration. It is often associated with areas of high productivity, such as upwelling zones, where nutrients are brought to the surface, supporting abundant marine life.

Taxonomy

Decapterus macrosoma belongs to the Class: Teleostei, Order: Carangiformes, and Family: Carangidae. This family encompasses a diverse group of fishes, including jacks, trevallies, pompanos, and scads, known for their streamlined bodies and predatory habits.

Feeding

Decapterus macrosoma is a carnivorous fish, feeding primarily on small planktonic organisms, including crustaceans and fish larvae. They are active hunters, using their sharp teeth and agile bodies to chase down their prey.

Associated Species

Image References

Leave a Comment