Marine snails (IMAGE) University of Sheffield Caption Adult snails adapted to different habitats. The larger snail is adapted for defense against crab attacks, while the small snail is adapted to live in areas with strong wave exposure. Credit Sophie Webster Usage Restrictions No restrictions. License Public Domain 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.