1. Cell Structure and Water Potential | Identifying cell components in mangroves, explaining glucose-to-starch conversion in plant cells for water balance. 2. Aquaculture and Alternative Feeds | Analyzing fishmeal replacement with soybean, evaluating growth rates and survival in fish farming. 3. Deep-Sea Mining and Conservation | Examining battery element extraction from hydrothermal vents, comparing challenges with oil drilling, and assessing environmental concerns. 4. Marine Respiration and Adaptation | Comparing gill structures in plankton feeders vs. predatory fish, evaluating gaseous exchange in marine species. 5. Marine Monitoring and Conservation | Discussing satellite tracking for fishing vessels, analyzing benefits and drawbacks in sustainable fisheries. 6. Microplastics and Marine Pollution | Investigating causes of increasing microplastic pollution, impacts on marine ecosystems and food chains.