Briareum Phyllodesmium

Speckled brown with long curved cerata that are yellow-tipped. The brownish specks (as can be seen in the close-up in picture 2) are actually one-celled plants (zooxanthellae) in the digestive gland. A symbiotic relationship exists between the two - the aeolid serves as a host for the zooxanthellae to reproduce and grow, while they provide nutrients to the host through photosynthesis.