Homarus gammarus, commonly known as the European lobster, is a species of marine crustacean found in the North Atlantic Ocean. It typically inhabits rocky seabeds and can be recognized by its large claws and long antennae. The coloration of the lobster ranges from dark blue to greenish-brown, often with bright blue spots. This species plays a significant role in marine ecosystems as both predator and prey. Homarus gammarus is also economically important, being a popular seafood choice in many countries. Conservation efforts are in place to manage its populations and ensure sustainable fishing practices.