Plankton Vocab Crossword

4. Small animals that feed on phytoplankton or other zooplankton.
7. Free-swimming aquatic organisms, such as fish and squid, capable of active movement.
9. A type of phytoplankton with a silica-based cell wall, often shaped like a glass shell.
10. Organisms that produce their own food through processes like photosynthesis.
12. Microscopic organisms that drift or float in aquatic environments.
13. Planktonic organisms that spend their entire life cycle in the planktonic phase.
14. A rapid increase in the population of planktonic organisms, often causing discoloration of the water.
15. Microscopic, photosynthetic organisms that form the base of the aquatic food chain.

1. Unicellular algae that can be both phytoplankton and sometimes bioluminescent.
2. Extremely small-sized plankton, smaller than microplankton.
3. Zooplankton that remain in the planktonic phase throughout their entire life cycle.
5. Planktonic organisms that spend only a part of their life cycle as plankton.
6. Organisms that obtain their energy by consuming other organisms.
8. Larger-sized plankton, visible under a microscope.
11. Small crustaceans that are a common type of zooplankton.
14. Pertaining to the bottom of a body of water; organisms living on or in the substrate.