Riddle the reef

6. Algae-derived compound used as a stabilizer in ice cream and dairy products.
8. Species known for bioluminescence in marine environments.
12. Algae-based product used as a vegan alternative to gelatin.
14. Algal group widely used as a food source in East Asian cuisine.
16. Environmental condition causing algal bloom explosions.
19. Marine organisms in symbiosis with corals.
20. Calcium carbonate-producing algae contributing to marine carbon cycling.

1. Microalgae used as a high-protein food supplement.
2. Algal group with two flagella and cellulose plates.
3. Eutrophication-triggering factor leading to algal overgrowth.
4. Toxin produced by cyanobacteria in eutrophic waters.
5. Prokaryotic organisms known for oxygenic photosynthesis and the ability to fix nitrogen.
7. Algae-derived product used in to make cosmetics and pharmaceuticals.
9. Dinoflagellate genus causing paralytic shellfish poisoning.
10. Algae that can be observe under microscope only.
11. The process by which algae convert sunlight into energy.
13. Algae that produce a chemical used in cloud seeding and climate regulation.
15. The green pigment found in all algae.
17. The primary pigment in red algae.
18. A glass-like cell wall component found in diatoms.