Jasus is a genus of marine crustaceans commonly known as spiny lobsters. They are characterized by their long antennae and spiny exoskeletons, which provide protection from predators. Spiny lobsters are found in warm waters around the world, often hiding in crevices and caves on the ocean floor. These lobsters are important both ecologically and economically. They play a significant role in marine ecosystems as scavengers, helping to clean up the ocean floor. Additionally, Jasus species are highly sought after in the seafood industry, making them a valuable resource for commercial fishing.