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Stratification (water) |
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| Pelagic | |
| Photic | |
| Epipelagic | |
| Aphotic | |
| Mesopelagic | |
| Bathyalpelagic | |
| Abyssalpelagic | |
| Hadalpelagic | |
| Demersal | |
| Benthic | |
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| Pycnocline | |
| Isopycnal | |
| Thermocline | |
| Halocline | |
| Thermohaline | |
| Chemocline | |
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Water stratification occurs when water of high and low salinity (halocline), as well as cold and warm water (thermocline), forms layers that act as barriers to water mixing.