The Biological Bulletin, December 2007 (IMAGE) Marine Biological Laboratory Caption Images, clockwise (beginning at top left), picture the taxa, with their environments shown in insets: Black-eared mouse (Peromyscus melanotis) foraging on a chemically defended monarch butterfly (Danaus plexippus) within a high-altitude forest habitat of central Mexico. Credits: J. Glendinning, W. Conway, L. Brower; Sacoglossan sea slug (Oxynoe sp.) on the green alga Caulerpa sertularioides in the Florida Keys. The chemical defenses of Caulerpa spp. may have allowed representatives of these species to invade new habitats, as in the case of Caulerpa taxifolia in the Mediterranean Sea. Credit: R. Williams; California newt (Taricha torosa), which possesses a potent toxin that has potentially profound effects on riparian stream communities within coastal mountain environments. Credit: R. Ferrer; Sea hare (Aplysia californica), shown here releasing ink for protection from predators, inhabits giant kelp forests (Macrocystis pyrifera) along the California coast. Credits: G. Anderson, E. Hanauer. Credit Cover designed by Beth Liles, MBL. Usage Restrictions None 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.