A nudibranch, this one is more specifically called Janolus cristatus. It grows to around 75mm in length. Since the body is transparent, you can clearly see its intestines running throughout. Photo by Rai Fernandez
A nudibranch, this one is more specifically called Janolus cristatus. It grows to around 75mm in length. Since the body is transparent, you can clearly see its intestines running throughout. Photo by Rai Fernandez