Table 5. Taxonomic classification of taxa reported in Canadian Arctic.
| Taxonomic group | No. taxa | State of knowledge | No. introduced species2 | No. experts | No. ID guides |
| Domain Archaea | 50–5000 | 1 | ND | 0 | 0 |
| Domain Bacteria (including Cyanobacteria) | 5004–50004 | 1 | ND | 0 | 0 |
| Domain Eukarya | |||||
| Other Eukarya (5 phyla) | 50–500 | 1 | ND | 2–3 | 0 |
| Kingdom Chromista | |||||
| Phaeophyta | 134 | 5 | 2? | ∼10 | 1 |
| Chromobiota (phyto) | 774 | 2 | ND | <5 | 2 |
| Kingdom Plantae | |||||
| Chlorophyta | 132 | 3 | ? | ∼10 | 2+1 |
| Rhodophyta | 66 | 4 | ? | ∼10 | 1 |
| Angiospermae (not included in our analysis) | ND | ND | ND | ND | ND |
| Kingdom Protoctista (Protozoa) | |||||
| Dinomastigota (Dinoflagellata) | 301 | 3 | ND | <5 | 2 |
| Foraminifera | ND | ND | ND | ND | ND |
| Unclassified Prototista | 41 | 2 | ND | <5 | 2 |
| Unclassified choanoflagellates | 30 | 2 | ND | <5 | 2 |
| Kingdom Animalia | |||||
| Porifera | 4 | 2 | ND | 1 | 0 |
| Cnidaria | 47 | 3 | ND | 2 | 3 |
| Platyhelminthes | 1 | 1 | ND | ND | 0 |
| Mollusca | 156 | 3 | ND | 3 | 1 |
| Annelida | 324 | 3 | ND | 1 | 2 |
| Crustacea | 722 | 3 | ND | 3 | 9 |
| Bryozoa/Ectoprocta | 3 | 2 | ND | ND | 2 |
| Echinodermata | 35 | 3 | ND | 1 | 3 |
| Urochordata (Tunicata) | 3 | 2 | ND | 2 | 1 |
| Other invertebrates | 52 | 2 | ND | 2 | 1 |
| Vertebrata (Pisces) | 189 | 4 | 0 | ∼5 | 5 |
| Marine mammals | 24 | 4 | 0 | 15–20 | 4–5 |
| SUBTOTAL | 30381 | ||||
| TOTAL REGIONAL DIVERSITY | 8142–58547 |
Notes: The taxonomic classification of phytoplankton, zooplankton species reported in Canadian Arctic, including the Hudson Bay system (Hudson Bay, Hudson Strait, and Foxe Basin). The benthic taxa are only the infaunal species.
1
Subtotal before the domains Bacteria, Eukarya, Archaea.
2
The total number of introduced species in the three Canadian oceans is approximately 112. We know this is an incomplete count that needs to be updated (A Locke, JM Hanson, and JL Martin, manuscript in preparation).