Lookdown

Lookdown25

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Selene vomer 01

Selene vomer 02

Selene vomer Nice 226 Lookdown C

Fish4445 - Flickr - NOAA Photo Library

Lookdown (Selene vomer) is a species of marine fish in the family Carangidae, which includes jacks, pompanos, jack mackerels, and scads. It is known for its distinctive, laterally compressed body and metallic silver coloration, which allows it to blend into its oceanic environment to evade predators. The lookdown is found in the western Atlantic Ocean, ranging from Maine to Uruguay, including the Gulf of Mexico and the Caribbean Sea. This species is often found in shallow coastal waters, including bays and estuaries, as well as near offshore reefs.

Description

The lookdown has a highly distinctive appearance, characterized by its deep, laterally compressed body and long, dorsal and anal fins that give it a somewhat angular look. The fish's head has a steep profile with a small mouth. Adult lookdowns can reach a length of up to 50 cm (20 in), though sizes around 30 cm (12 in) are more common. The body is covered in large, reflective scales that give the fish its silvery appearance, aiding in camouflage among the water's surface reflections.

Habitat and Distribution

Lookdowns prefer warm, shallow coastal waters and are often found in depths ranging from 1 to 80 meters (3 to 262 feet). They are typically seen in schools, especially during their juvenile stages, around areas with sandy or muddy bottoms where they search for food. Their range extends from the temperate and tropical waters of the western Atlantic, from Maine in the north to Uruguay in the south, including significant populations in the Gulf of Mexico and the Caribbean Sea.

Diet

The diet of the lookdown consists mainly of small fish, crustaceans, and other invertebrates. They are opportunistic feeders, often feeding at the water's surface or near the bottom, where their prey resides.

Behavior

Lookdowns are known for their schooling behavior, particularly during their juvenile stage, which provides safety in numbers from predators. They are capable swimmers, using their laterally compressed bodies to maneuver quickly through the water. This body shape also allows them to reflect light in a way that makes them difficult for predators to spot.

Conservation Status

The lookdown is not currently listed as endangered or threatened by any major conservation organization. However, like many marine species, they face threats from habitat destruction, pollution, and overfishing. Efforts to monitor their populations and the health of their habitats are crucial for ensuring their long-term survival.

In Aquariums

Due to their striking appearance and interesting behavior, lookdowns are sometimes kept in public and private aquariums. They require large tanks with plenty of space to accommodate their schooling nature and fast swimming. Special attention must be given to their diet and the quality of the water to maintain their health in captivity.