Costasiella kuroshimae

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Costasiella kuroshimae
Costasiella cf kuroshimae.png
Costasiella cf. kuroshimae on Avrainvillea erecta. Locality: Lizard Island, Great Barrier Reef. The length of the slug is about 1 cm.
Scientific classification
C. kuroshimae
Binomial name
Costasiella kuroshimae
Ichikawa, 1993

Costasiella kuroshimae, also known as "leaf slug"[1] or "leaf sheep",[2] is a species of sacoglossan sea slug, a shell-less marine opisthobranch gastropod mollusk in the family Costasiellidae.[3] They can grow up to 1 cm in length.

It performs kleptoplasty, which is the process of retaining the chloroplasts from the algae it feeds on so that it can use them to perform photosynthesis.[4]

The type locality is Kuroshima, Taketomi, Okinawa, Ryukyu Islands.[5]


  1. ^ "These Cute Sea Slugs Are The Sheep Of The Sea". IFLScience. Retrieved 2020-07-17.
  2. ^ Schelling A. "Sheep Of The Sea Are Cutest Slugs We've Ever Seen". The Dodo. Retrieved 2020-07-17.
  3. ^ Bouchet P (2014). "Costasiella kuroshimae Ichikawa 1993". World Register of Marine Species. Retrieved 17 January 2015.
  4. ^ Händeler K, Grzymbowski YP, Krug PJ, Wägele H (December 2009). "Functional chloroplasts in metazoan cells - a unique evolutionary strategy in animal life". Frontiers in Zoology. 6 (1): 28. doi:10.1186/1742-9994-6-28. PMC 2790442. PMID 19951407.
  5. ^ Jensen KR (2007). "Biogeography of the Sacoglossa (Mollusca, Opisthobranchia)" (PDF). Bonner Zoologische Beiträge. 55 (3/4): 255–81. Archived from the original (PDF) on 2013-10-05.

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