Pellona harroweri, called the American coastal pellona and the caille, is a species of longfin herring native to the beaches and estuaries of the western Atlantic from Costa Rica to Southern Brazil. Some individuals can reach 18 cm, with the average closer to 12 cm. They school in very shallow waters, and are rarely found deeper than 16 m.

The species is consider a forage fish

Forage fish

Forage fish, also called prey fish or bait fish, are small fish which are preyed on by larger predators for food. Predators include other larger fish, seabirds and marine mammals. Typical ocean forage fish feed near the base of the food chain on plankton, often by filter feeding...

, used for bait for commercial fish and consumed by humans on a subsistence level. They are eaten by the Costero

Costero

The Costero is found in the coastal waters to the north and east of South America. The common name "costero" has been suggested by Caballero and colleagues due to the species' affinity for coastal habitats. The Costero is a member of the oceanic dolphin family . Physically it resembles the...

 dolphin, and by the La Plata dolphin

La Plata Dolphin

The La Plata Dolphin or Franciscana is found in coastal Atlantic waters of southeastern South America. Taxonomically it is a member of the river dolphin group and the only one that actually lives in the ocean and saltwater estuaries, rather than inhabiting exclusively freshwater...

.