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Retusa concentrica (A.Adams, 1850) Photographed by Manabu Kakegawa Location Wannai, Osezaki, Higashiizu, Japan Date 2020/06/29 Length 3mm Depth 10.0m Water temperature 21.0℃ Comment is not registered Post Send Message Seasonality Posted by Retusa concentrica Manabu Kakegawa Osezaki Same Genus Nudibranchs Similar Colors Nudibranchs ← Hamineobulla kawamurai Retusa phiala →