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Stone Centipedes - Living Fossils
https://australian.museum/learn/animals/centipedes/centipedes-stone-centipede-living-fossils/

The little yellow or red-brown creatures known to science as Lithobiomorpha may not look like much, but they are living records of Australia's ancient natural history.

What is Plankton?
https://australian.museum/learn/animals/plankton/what-is-plankton/

Plankton is made up of animals and plants that either float passively in the water, or possess such limited powers of swimming that they are carried from place to place by the currents.