A pseudo-colored scanning electron micrograph shows the presence of chloride transport epithelium involved in salt balance on the cirri (feeding apparatus) of the adult barnacle (Amphibalanus amphitrite). To feed, barnacles extend the cirri into the ocean to catch small organism like tiny shrimp. As the ciiri extend out in the ocean the chloride ephithelium on the cirri may be involved in helping the barnacle maintain osmotic balance (salt balance) in its body.