| A | B |
|---|
| Monera kingdom | Singled celled organisms lacking discrete nuclei |
| Plantae kingdom | Multicelled plants |
| Animalia kingdom | Multicelled animals |
| Fungi kingdom | Very common in the intertidal zone |
| Protoctista kingdom | Marine algae for example |
| Species | Fundamental unit of classification |
| Plankton | Floaters |
| Necton | Swimmers |
| Benthos | Bottom dwellers |
| Pelagic environment | Water column |
| Hypertonic | Saltier than surrounding seawater |
| Hypotonic | Less salty than the surrounding environment |
| Epipelagic | Surface to 200 meters |
| Mesopelagic | Sub-surface: 200 meters to 1000 meters |
| Bathypelagic | Sub-surface: 1000 meters to 4000 meters |
| abyssopelagic | Sub-surface: below 4000 meters |
| Euphotic zone | Surface to a depth were photosynthesis still is possible |
| Disphotic zone | Sub-surface: Bottom of photosynthesis zone to where light no longer exists |
| Aphotic zone | No light exists at this depth |
| Ecosystem | Biotic community plus the environment |
| Food chain | Sequence of organisms that transfer energy |
| Commensalism | Remoras and sharks for example |
| Mutualism | Clown fish and anemones for example |
| Parasitism | solderfish and isopods for example |
