ALEXANDER SEMENOV / SCIENCE PHOTO LIBRARY ALEXANDER SEMENOV / SCIENCE PHOTO LIBRARY
Amphipod crustaceans. Close-up of two amphipods (Anonyx nugax) burrowing in gravel. Amphipods typically have a laterally flattened body and fourteen limbs. They form part of the zooplankton: small, floating marine animals that are an important food source for many larger animals.
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