Table 2. Seaweed taxa (species, subspecies, varieties) on Canada's three ocean coastlines.
| Province | Chlorophyta | Phaeophyceae | Rhodophyta | Tribophyceae | Total |
| Canadian Arctic# | 61 | 75 | 66 | 3 | 210 |
| Eastern Canada* | 90 | 120 | 130 | 9 | 350 |
| Western Canada° | 120 | 134 | 380 | 6 | 650 |
*loosely based on [98], including records from the Bay of Fundy northward.
°
based on [97], excluding taxa known only from Oregon but adding subsequently described taxa and some undescribed cryptic species.
The Canadian Arctic province represents distributions from the Bering Strait to Labrador; Eastern Canada extends from the Bay of Fundy to Labrador; Western Canada extends from Washington state to southeast Alaska. Values shown are conservative estimates, though totals have been rounded upward to the nearest ten.