Green Nudibranch

This nudibranch is known as the Nembrotha Cristada. This photo was taken in the Phillippines, in Anilao. These sea slugs are generally around 50 mm in length. The colorful sea creature posed for me, and seemed to look directly at my camera! Thankfully, it didn't move, unlike many of its counterparts, and I was able to get a straight, upright shot!