The Lookdown gets its name because of the way that it always appears to be looking down. The larval lookdown has long filaments from its dorsal fin, which help it blend in with grasses. Guanine pigments in the lookdown’s skin reflect light so that it flashes like a silver mirror.
Tropical and sub-tropical and temperate marine coastal and estuarine waterways. Western Atlantic: Maine, Bermuda, and Florida to Gulf of Mexico and Uruguay.
Small crabs, shrimp, fishes and worms.
Lookdown larvae are believed to develop further offshore. Juveniles are generally found near sandy shores or in estuaries, where they seek the shelter of sea grass beds or harbor piers. Adults might venture onto coral reefs in search of prey, but generally occur over open mud- or sand-covered bottoms.
Lookdowns are preyed upon by larger fish, some fisherman and aquarium collectors.