This species can be very common on shallow muddy and sandy reefs. They are usually exposed during the day soaking up sunlight used by their captured chloroplasts to generate food and oxygen. If you peel back the two spotted flaps that meet along the centerline of the back, it is bright green inside.
This animal seems unhealthy as its parapodia are degenerating, showing the green chloroplasts farmed beneath.
Created 20 April 2009
Updated 9 November 2021