PETR JAN JURACKA / SCIENCE PHOTO LIBRARY PETR JAN JURACKA / SCIENCE PHOTO LIBRARY
Water flea egg case. Coloured scanning electron micrograph (SEM) of an egg case from a Daphnia hrbaceki water flea, surrounded by the ephippium. Water fleas (order Cladocera) are small crustaceans, commonly found in fresh water. Winter, or dry-season, cladoceran eggs have an extra shell layer, the ephippium, that protects them from harsh environmental conditions until they become more favourable. This specimen measures 0.8mm long.
Model release not required. Property release not required.