Little leaf-sheep (Costasiella kuroshimae)

Little leaf-sheep, a reference photo — Photo: Christian Gloor · CC BY 2.0 (licence)

Costasiella kuroshimae (also known as a leaf slug, sea sheep, or leaf sheep) is a species of sacoglossan sea slug. Costasiella kuroshimae are shell-less marine opisthobranch gastropod mollusks in the family Costasiellidae. Despite being animals, they perform photosynthesis, via kleptoplasty.

From Wikipedia, under CC BY-SA 4.0.

Is it venomous or poisonous?

We have no record of Little leaf-sheep being toxic, poisonous or venomous. That is not proof that it is safe. Never eat, touch or handle a wild plant, mushroom or animal on the strength of an identification; ask someone qualified.

Easily confused with

Costasiella ocellifera
Costasiella fridae
Ercolania viridis

Classification

Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Family: Costasiellidae
Genus: Costasiella
Species: Costasiella kuroshimae

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