This document summarizes a marine science lesson about mangrove trees. It describes the three main types of mangroves - red, black, and white - and their unique adaptations for surviving in salty conditions. It also discusses the important role mangroves play in the environment by supporting a rich food web and providing ecological protection. The document outlines assignments for students to research mangrove locations, draw a mangrove food web, and write a letter persuading a community not to cut down mangroves and explaining their environmental importance.