Across
- 1. eat phytoplankton
- 4. phytoplankton turn into this when they undergo photosynthesis
- 5. eaten by zooplankton, base of the food chain
- 6. caused by red phytoplankton
- 8. single-celled life form
- 9. a type of phytoplankton, grows on rocks
Down
- 2. a process in which plants make food
- 3. home of the plankton
- 7. animals eating other animals