This photo shows a close-up of Ascidia ciona intestinalis, a sea squirt or tunicate, attached to a blade of eelgrass Zostera marina in the Swedish west coast. Ascidians are filter feeders that draw water into their bodies to capture plankton and other small organisms. They are commonly found in marine environments and play an important role in the ecosystem. This image is taken with a Nikon D7500 and a macro lens