Homarus americanus, commonly known as the American lobster, is a species of marine crustacean found primarily along the Atlantic coast of North America. It is characterized by its large claws, long antennae, and a hard exoskeleton that can vary in color from greenish-brown to blue. American lobsters typically inhabit rocky or sandy ocean floors and can grow to significant sizes, with some individuals weighing over 40 pounds. These lobsters are an important part of the fishing industry and are often harvested for their meat, which is considered a delicacy. They are usually caught using traps and are known for their ability to regenerate lost limbs. The American lobster plays a crucial role in the marine ecosystem, serving as both predator and prey.