North Pacific Ocean surface areas of PICES defined sub-regions
The North Pacific Marine Science Organization (PICES) sub-region of the North Pacific Ocean is defined as north of 30°N to the Bering Strait at about 67°N.
| Sub-region Name | Code | Area (km2) | Area Covered (%) |
| Eastern Bering Sea (Continental) Shelf | BSC | 1,022,000 | 3.9 |
| Western Bering Sea and Basin (Pelagic) | BSP | 1,358,000 | 5.1 |
| Gulf of Alaska (Continental Shelf) | ASK | 428,000 | 1.6 |
| California Current, North | CAN | 166,000 | 0.6 |
| California Current, South | CAS | 129,000 | 0.5 |
| Eastern Sub-Arctic | ESA | 3,622,000 | 13.6 |
| Western Sub-Arctic | WSA | 2,168,000 | 8.2 |
| Kamchatka and Kuril Islands | KM/KL | 112,000 | 0.4 |
| Sea of Okhotsk | OKH | 1,600,000 | 6.0 |
| Eastern Transition Zone | ETZ | 7,809,000 | 29.4 |
| Western Transition Zone | WTZ | 6,338,000 | 23.9 |
| Kuroshio/Oyashio Currents Zone | KR/OY | 348,000 | 1.3 |
| Sea of Japan | SJP | 1,006,000 | 3.8 |
| East China Sea | ECS | 435,000 | 1.6 |
| Total | 26,542,000 | 100.0 |