Leucothea ctenophore... Of all the shallow-water lobate ctenophores, this spectacular species is the largest, reaching lengths of at least 25 cm. More at http://jellieszone.com/leucothea.htm
Inside the White Sea Biological Station is an unlikely photo studio where Alexander Semenov, 25, is sharing his stunning photographs of arctic sea creatures with the global online community.
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Caprella septentrionalis - an Arctic Sea Creature