GEORGETTE DOUWMA / SCIENCE PHOTO LIBRARY GEORGETTE DOUWMA / SCIENCE PHOTO LIBRARY
Upside-down jellyfish (Cassiopea andromeda) in open water. This jellyfish swims and lies on the sea-bed with its mouth and tentacles facing upwards (as here). It is commonly mistaken for an anemone as often only its tentacles are visible when on the sea floor. Photographed off Lembeh, Sulawesi, Indonesia.
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