The document discusses different types of aquatic ecosystems including freshwater and marine environments. Freshwater ecosystems include flowing water, standing water, wetlands like bogs and marshes, and the unique Everglades region of Florida. Marine ecosystems are divided into photic and aphotic zones based on light levels, and include intertidal zones, coastal oceans, open oceans, and benthic zones on the ocean floor, such as kelp forests and coral reefs.