Gobies are small fish belonging to the family Gobiidae, commonly found in both freshwater and marine environments. They are characterized by their elongated bodies and fused pelvic fins, which form a disc-like structure that helps them cling to surfaces. Gobies are often seen in sandy or rocky habitats, where they can hide from predators. These fish are known for their diverse behaviors and adaptations. Some species are capable of living in brackish water, while others can even survive out of water for short periods. Gobies play an important role in their ecosystems, serving as both prey and predators in the food web.