MATTHEW OLDFIELD / SCIENCE PHOTO LIBRARY MATTHEW OLDFIELD / SCIENCE PHOTO LIBRARY
Many host goby (Pleurosicya mossambica) on a cat's eye coral (Cynarina lacrymalis). This fish spends its whole life around its chosen host, which may be a sponge, coral or other sedentary animal. It is found in the tropical Indo-west Pacific and can grow up to 3 centimetres in length. Photographed in Tulamben, Bali, Indonesia.
Model release not required. Property release not required.