Marine Biology

2. also called the midnight zone, this ocean layer goes from about 1000 to 4000 meters
9. relationship in which both species benefit from the relationship
11. relationship in which one organism benefits and the other is not helped or harmed
13. pitchblack layer of the ocean that contains 75% of the deep ocean floor
14. plankton that eat other organisms
15. two or more species fight for the same resources
17. an interaction in which one organism kills and feeds on another organism

1. deepest layer of the ocean that reaches pressures of over 1000 atmospheres
3. a similarity of one species to another that protects one or both
4. diverse group of organisms that live in fresh and saltwater and that cannot swim against a current
5. plankton that are bacteria
6. a relationship in which two species live closely together
7. plankton that remain plankton their whole lives
8. plankton that are only plankton part of their life
10. also called the twilight zone, this is the ocean layer where sunlight is very faint and bioluminescence begins
12. autotrophic plankton called algae
16. top layer of the ocean where sunlight penetrates