These are juvenile Luidia ciliaris. This species is found in the benthic environments of the Atlantic and Mediterranean seas up to a depth of about 400 meters. Usually identified by its orange-brown color and 7 radiating arms. The short arms of these baby starfishes will grow to be really long ones, making these not-so little critters grow to almost 40 centimeters across.
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Inspired by: 12 Planktons of Christmas by Michele Collet