Plankton

4. Small crustaceans that are a common type of zooplankton.
6. Planktonic organisms that spend only a part of their life cycle as plankton.
8. A type of phytoplankton with a silica-based cell wall, often shaped like a glass shell.
10. A rapid increase in the population of planktonic organisms, often causing discoloration of the water.
11. Extremely small-sized plankton, smaller than microplankton.
12. Microscopic, photosynthetic organisms that form the base of the aquatic food chain.
14. Larger-sized plankton, visible under a microscope.

1. Microscopic organisms that drift or float in aquatic environments.
2. Zooplankton that remain in the planktonic phase throughout their entire life cycle.
3. Free-swimming aquatic organisms, such as fish and squid, capable of active movement.
5. Pertaining to the bottom of a body of water; organisms living on or in the substrate.
7. Organisms that produce their own food through processes like photosynthesis.
9. Small animals that feed on phytoplankton or other zooplankton.
13. Planktonic organisms that spend their entire life cycle in the planktonic phase.
15. A bloom of harmful, often toxic, phytoplankton that can lead to the discoloration of water.