Plankton

2. Tide bloom of harmful, toxic, phytoplankton, leads to discoloration of water
5. planktonic organisms that spend only part their life as plankton
7. microscopic organisms that drift or float
10. small crustaceans that are common zooplankton
11. planktonic organisms that spend their whole life cycle as plankton
12. Depth depth in the water where rate of photosynthesis equals rate of respiration
14. larger-size plankton, visible under microscope
15. unicellular algae that can be both phytoplankton and sometimes bioluminescent
16. pertaining to the bottom of a body of water

1. photosynthetic organisms that form the base of aquatic food chain
3. phytoplankton with silica-based cell wall, shaped like glass shell
4. organisms that obtain energy by consuming other organisms
6. free-swimming aquatic organisms such as fish and squid
8. small animals that feed of phytoplankton or other zooplankton
9. rapid increase in population of plankton organisms, causes discoloration of water
13. organisms that produce their own food through photosynthesis