A Goby is a small fish belonging to the family Gobiidae, which includes over 2,000 species. These fish are typically found in both freshwater and marine environments, often inhabiting shallow waters, coral reefs, and sandy substrates. Gobies are known for their unique body shape, which is usually elongated and features a fused pelvic fin that forms a disc-like structure, allowing them to cling to surfaces. Many species of gobies exhibit interesting behaviors, such as forming symbiotic relationships with other marine animals, like shrimp. They often share burrows with these creatures, providing protection for both. Gobies are also popular in the aquarium trade due to their vibrant colors and active nature.