1. Photosynthesis and Ocean Zones | Investigating light intensity changes across ocean depths, phytoplankton growth, and photosynthesis efficiency. 2. Marine Food Webs and Biomass Transfer | Analyzing biomass pyramids, trophic level efficiencies, and nutrient cycling in ocean ecosystems. 3. Phytoplankton Distribution and Ocean Conditions | Examining temperature, nitrate concentration, and thermocline depth in relation to phytoplankton populations. 4. Acidification Effects on Marine Organisms | Evaluating how pH changes near underwater vents impact snail shell thickness and algae nutrition. 5. Shark Population Estimation and Growth Rates | Applying the Lincoln Index for population estimation and analyzing growth rate data of Carcharias taurus. 6. Tsunami Formation and Coastal Impact | Exploring earthquake-generated tsunamis, their effects on coastal geomorphology, and erosion processes.