Critters of the Lembeh Strait | “Grazing“ - Sheep of the Costasiella Family

Many know these adorable little sap-sucking slugs (technically not nudibranchs) as ’Shaun the Sheep’, due to their resemblance to sheep grazing on grass. They are tiny (from just a millimeter up to about 12 millimeters maximum length) and can be found feeding on the host algae Avrainvillea spp which looks like a large, single, round green leaf which sticks up vertically out of the sand on Lembeh’s muck sites. They are members of the Sacoglossa family which is the only group of animals known to engage in kle