Family Gerreidae, also known as the mojarras or grunts, is a diverse group of fish that belongs to the order Perciformes. This family comprises numerous species found in marine, brackish, and freshwater habitats, primarily in tropical and subtropical regions around the world. The term Gerreidae is derived from the Greek word "gerros," meaning "grunt," which accurately describes the characteristic grunting sound produced by these fish.
Members of the Gerreidae family are recognized by their elongated and laterally compressed bodies, typically measuring between 10 to 30 centimeters in length. They possess a slightly arched dorsal profile and a small mouth positioned on the underside of the head. The eyes are of medium size and located towards the top of the head, providing them with good vision to navigate their surroundings.
These fish are known for their distinct coloration, often exhibiting shades of silver, gray, or yellow, with a series of horizontal dark bands running along their sides. Some species also possess vertical bars or spots on their bodies, assisting in camouflage and providing protection from predators.
The mojarras are largely herbivorous, feeding on algae, detritus, and small invertebrates. They are generally social animals and form schools, particularly during their early life stages. Due to their abundant presence in various ecosystems, they serve as a significant link in the food chain, providing sustenance for larger predatory fish.
While some species within the Gerreidae family are targeted by commercial and recreational fisheries for their meat, others play an essential role in maintaining the health and balance of their respective habitats. Overall, the Family Gerreidae encompasses a diverse group of fish that are ecologically significant and contribute to the rich biodiversity of aquatic ecosystems
