GEORGETTE DOUWMA / SCIENCE PHOTO LIBRARY GEORGETTE DOUWMA / SCIENCE PHOTO LIBRARY
Yellow sea cucumber (Colochirus robustus, yellow) and gorgonian coral (order Alcyonacea, purple) on a reef. Sea cucumbers are scavenging animals that travel across the sea bed using their tentacles to search for plankton and the remains of other animals. Photographed off West Papua, Indonesia.
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