ALEXANDER SEMENOV / SCIENCE PHOTO LIBRARY ALEXANDER SEMENOV / SCIENCE PHOTO LIBRARY
Amphipod crustacean. Close-up of the front of an amphipod's head, showing its mouthparts (red, centre) and antennae (top). 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 animals.
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