Costasiella

Costasiella kuroshimae — known as 'sea bunny' — is one of the most adorable and rare sea slugs. Measuring less than 1 cm, its translucent body adorned with emerald green cerata speckled with white and orange gives it the appearance of a mini plush deer. A specialist of the green algae Avrainvillea, from which it absorbs chloroplasts (a form of animal photosynthesis), it lives only in a few locations in the world. In Nosy Be Madagascar, DUNE offers specialized night dives to find this extraordinary species that alone makes the trip worthwhile.