''Thuridilla gracilis '' is a species of sea slug, a sacoglossan, a marine gastropod mollusk in the family Plakobranchidae. It is an Indo-Pacific species that lives in or near coral reefs and eats algae.
Similar species: Sacoglossa
By Patomarazul
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Uploaded Dec 2, 2018. Captured May 25, 2018 05:47 in Unnamed Road, Batukota, Lembeh Utara, Kota Bitung, Sulawesi Utara, Indonesia.
