ALEXANDER SEMENOV / SCIENCE PHOTO LIBRARY ALEXANDER SEMENOV / SCIENCE PHOTO LIBRARY
Tunicate (class Larvacea). Larvacean tunicates are small tadpole-like animals found throughout the world's oceans. They create a mesh (known as a 'house') around their bodies which they use to filter minute food particles from the surrounding water. These structures are regularly discarded and replaced.
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