Electron microscope picture of a water bear, or tardigrade. Water bears are tiny invertebrates that live in aquatic and semi-aquatic habitats such as lichen and damp moss. Water bears are found throughout the world, including regions of extreme temperature, such as hot springs, and extreme pressure, such as deep underwater. They can also survive the high levels of radiation and vacuum of space. Weird Creatures, Sea Creatures, Animals Amazing, Science Images, Microscopic Photography, Little Critter