Plankton

4. Level: The position an organism occupies in a food chain, indicating its feeding relationship
6. Small animals that feed on phytoplankton or other zooplankton.
10. Tide: A bloom of harmful, often toxic, phytoplankton that can lead to the discoloration of water.
13. Zooplankton that remain in the planktonic phase throughout their entire life cycle.
14. A close and long-term interaction between different biological species.
16. Free-swimming aquatic organisms, such as fish and squid, capable of active movement.
17. Extremely small-sized plankton, smaller than microplankton.
18. A rapid increase in the population of planktonic organisms, often causing discoloration of the
20. Microscopic organisms that drift or float in aquatic environments.
21. Larger-sized plankton, visible under a microscope.

1. Microscopic, photosynthetic organisms that form the base of the aquatic food chain.
2. Unicellular algae that can be both phytoplankton and sometimes bioluminescent.
3. Organisms that obtain their energy by consuming other organisms.
5. Small crustaceans that are a common type of zooplankton.
7. other organisms.
8. Depth: The depth in the water column where the rate of photosynthesis equals the rate of
9. A type of phytoplankton with a silica-based cell wall, often shaped like a glass shell.
11. Planktonic organisms that spend their entire life cycle in the planktonic phase.
12. Organisms that produce their own food through processes like photosynthesis.
15. Planktonic organisms that spend only a part of their life cycle as plankton.
19. Pertaining to the bottom of a body of water; organisms living on or in the substrate.