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wood prints animal wood prints water bear wood prints sem wood prints scanning electron micrograph wood prints tardigrades wood prints invertebrate wood prints aquatic wood prints semi-aquatic wood prints microfauna wood prints biology wood prints zoology wood prints tardigrade wood prints

photographs animal photos water bear photos sem photos scanning electron micrograph photos tardigrades photos invertebrate photos aquatic photos semi-aquatic photos microfauna photos biology photos zoology photos tardigrade photos

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Water bear leg (Echiniscus granulatus). Color enhanced scanning electron micrograph (SEM) of a water bear's leg. Water bears (or tardigrades) are tiny invertebrates that live in aquatic and semi-aquatic habitats such as lichen and damp moss. They have four pairs of short legs each with a set of claws at the end. Water bears require water to obtain oxygen by gas exchange. In dry conditions, they can enter a cryptobiotic state of desiccation, known as a tun, to survive. In this state, water bears can survive for up to a decade. Echiniscus granulatus is an herbivorous species that feeds on moss cells. This specimen originated from moss samples in Tubingen, Germany. 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 high levels of radiation and the vacuum of space. Magnification: x1670 when printed 10cm wide.