<i>Tylodina fungina</i> (IMAGE) Smithsonian Tropical Research Institute Caption This marine snail, Tylodina fungina, was collected in a dredge sample with its host sponge. This species feeds exclusively on a single species of sponge that matches its yellow color exactly. Despite being featured in field guides, very little is known about its biology. Credit Antonio Baeza Usage Restrictions Please credit to Antonia Baeza, Smithsonian Tropical Research Institute License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.