The NGC 3581 group is a collection of galaxies located in the constellation of Hydra. This group includes several notable galaxies, with NGC 3581 being the brightest member. The galaxies in this group are relatively close to each other in space, making them an interesting subject for astronomers studying galaxy interactions and formations. The NGC 3581 group is part of a larger structure known as the Laniakea Supercluster, which contains thousands of galaxies. Observations of this group help scientists understand the dynamics of galaxy clusters and the gravitational influences that shape their evolution over time.