In 2022, the Metlakatla Indian Community first spotted shells of European green crab, or Carcinus maenus, during regular monitoring at the Annette Islands Reserve. Subsequent monitoring turned up live crabs.
This summer, the group reported a large population growth in the surrounding area.
Monitors reported trapping 2,133 in 2023, and 1,865 in 2024. That number jumped to over 40,000 this year.
This species is of particular concern because it is aggressive. It has destroyed habitats and outcompeted local species in other locations. Among its prey are juvenile king crab and juvenile salmon.
The Council has been studying these crab and other marine invasive species since 1996. Research on has shown that:
- The crab survives in environments like Prince William Sound. A warming climate makes an even more suitable habitat.
- Larvae of the crabs could survive a trip to Alaska in an oil tanker’s ballast water.
Links to additional resources, and what to do if you see a suspected green crab: www.pwsrcac.org/greencrab