Atherinopsidae

Atherinopsidae is a family of ray-finned fish belonging to the order Atheriniformes. This family is characterized by its small to medium-sized members, typically ranging from 2 to 10 centimeters in length. Atherinopsidae are found in both freshwater and marine environments, with a few species inhabiting brackish waters. They are known for their distinctive, elongated bodies and the presence of a single dorsal fin, which is supported by 10 to 12 spines and 10 to 12 soft rays. The anal fin is also supported by 10 to 12 spines and 10 to 12 soft rays. The family includes around 15 genera and approximately 50 species, with the most well-known genus being Atherinops, which contains several species found in the coastal waters of the eastern United States and the Caribbean. Atherinopsidae are generally considered to be herbivorous or omnivorous, feeding on algae, detritus, and small invertebrates. They play an important role in their ecosystems by helping to control algal growth and maintaining water quality. The family is further divided into two subfamilies: Atherinopsinae and Craterocephalinae. Atherinopsidae are of interest to both scientific researchers and aquarium enthusiasts due to their unique characteristics and ecological significance.