Invasive invertebrates other than insects and spiders

Invasive invertebrates other than insects and spiders are from one part of the world that are transported, or migrate due to climate change, beyond their natural range and become established in a new area where they can cause potential harm to native ecosystems.

There are 5 priority categories for invertebrates which determine the province's response. They are: 

  1. Prevent
  2. Early detection and rapid response (EDRR)
  3. Provincial containment
  4. Regional containment/control
  5. Management


Species determined to be high risk to B.C. and not yet established. Management objective is prevent the introduction and establishment.
Apple snail
Ampullariidae​ sp.
Conrad's false mussel
Mytilopsis leucophaeata​
Marbled crayfish
Procambarus fallax f. virginalis​ crayfish
Orconectes neglectus crayfish (PDF, 540KB)
Orconectes rusticus waterflea
Bythotrephes longimanus Lantern fly
Lycorma delicatula​ crayfish
Orconectes virilis

Zebra & Quagga mussels
Dreissena polymorpha & bugensis

Early detection and rapid response (EDRR)

Provincial EDRR

Species is high risk to B.C. and is new to the Province. Management objective is eradication.

Provincial containment

Species is high risk with limited extent in B.C. but significant potential to spread. Management objective is to prevent further expansion into new areas with the ultimate goal of reducing the overall extent.
Asian clam (PDF, 500KB)
Corbicula fluminea
Cherry shrimp
Neocaridina davidi Zealand mudsnail
Potamopyrgus antipodarum




Species is more widespread but may be of concern in specific situations with certain high values - e.g., conservation lands, specific agriculture crops. Management objective is to reduce the invasive species impacts locally or regionally, where resources are available.
Banded garden snail
Cepaea nemoralis

Photo courtesy of Ondrej Zicha,, EOL.
Freshwater jellyfish
Craspedacusta sowerbyi

Photo by Megan Paustian
Land slugs
Arion spp. (rufus and vulgaris)