The EMU Explorer serves as a powerful tool for laboratory exercises. When teaching the impact of agricultural fertilizer runoff and corresponding “dead zones,” explain the relationship between fertilizer runoff, algal blooms, oxygen consuming bacteria, and marine life. Use the app to examine dissolved oxygen levels in the water columns of the Gulf of Mexico. Then have students explore several locations closer to the mouth of the Mississippi to determine if they can notice any change. Students will learn firsthand that the bacteria decomposing the algae leave insufficient oxygen for fish, shrimp, and other marine life to survive, causing them to flee or die.