The lookdown (Selene vomer) is a species of game fish in the family Carangidae.

[3] The longest lookdown known was 48.3 cm (19.0 in) long,[5] and the heaviest weighed 2.1 kilograms (4.6 lb).

[6] In the western Atlantic, the lookdown is found from Canada[7] and Maine south to Uruguay,[8] including Bermuda and the Gulf of Mexico.

[8] The lookdown is found in marine and brackish waters at depths of 1 to 53 meters (3.3 to 170 ft).

However, it is sought after for large public aquarium displays due to its interesting shape and flashy appearance.