ALEXIS ROSENFELD / SCIENCE PHOTO LIBRARY ALEXIS ROSENFELD / SCIENCE PHOTO LIBRARY
Sea squirts. Group of light bulb tunicates (Clavelina lepadiformis), a type of sea squirt, attached to seaweed. This is a primitive, filter- feeding animal that inhabits shallow coastal waters in the north-eastern Atlantic Ocean and Mediterranean Sea. Photographed in the Mediterranean Sea.
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