Homarus is a genus of marine crustaceans commonly known as lobsters. They are characterized by their long bodies, large claws, and hard exoskeletons. The two most well-known species are the American lobster (Homarus americanus) and the European lobster (Homarus gammarus). These lobsters are typically found in cold, shallow waters along the coasts of North America and Europe. Lobsters are important both ecologically and economically. They play a significant role in marine ecosystems as predators and prey. Additionally, they are a popular seafood choice, contributing to commercial fishing industries in various regions. Their unique biology and behavior make them a subject of interest in marine research.