Ocean water layer
Classification structure
| Code | Title |
|---|---|
| 1 | Surface epipelagic (0 to 50 m), ocean water layer |
| 2 | Lower epipelagic (50 to 200 m), ocean water layer |
| 3 | Mesopelagic (200 to 1000 m), ocean water layer |
| 4 | Bathypelagic (1000 to 4000 m), ocean water layer |
| 5 | Abyssopelagic (deeper than 4000 m), ocean water layer |
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