Leeches are segmented worms. Like the oligochaetes, such as earthworms, leeches share a clitellum and are hermaphrodites. Their bodies are much more solid as the spaces in their coelom are dense with connective tissues. They also have two suckers, one at each end. The majority of leeches live in freshwater environments, while some species can be found in terrestrial and marine environments, as well.