Reef sharks refer to a group of small, generally harmless and often colorful species of shark that are commonly found swimming around coral reefs. These sharks typically have a slender body shape with sharp teeth and are known for their ability to blend in with the surrounding environment due to their coloration which resembles the colors of the corals they inhabit. Reef sharks feed on small fish, crustaceans, and other marine organisms that live among or near reefs. They play an important role in maintaining a healthy balance within the ecosystem as they help control populations of certain species while also providing food for larger predators such as larger shark species.