This article describes a two-day lesson in which fifth-grade students took on the role of marine biology scientists, using their critical-thinking and problem-solving skills to explore human impact on the blue crab ecosystem. The purpose of "Crabby Interactions" was to help students understand the impact of human activities on the local…

Discusses marine adaptations of seabirds, feeding/breeding methods, and their vulnerability to predators. Also considers dangers from new "predators," such as hunting, environmental factors (pollution/pesticides), and loss of natural environments. Future prospects for the survival of these organisms are considered. (JN)