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Potential invasive species list for Japan.
Invertebrates (except insects) Alert List Go to Established species list

Mammals | Birds | Reptiles | Amphibians | Fishes | Insects | Invertebrates (except insects) | Plants | Miscellaneous
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Higher Taxa Scientific Name
[Common name]
Legal control in Japan Potential impact
Bolinopsidae, Lobatae, Tentaculata, Ctenophora Mnemiopsis leidyi
  [Sea walnut]
Mass generation and predation on zooplankton. Competitive with fishes. N ...
Sicariidae, Araneae, Arachnida, Arthropoda Loxosceles gaucho
  [Brown Spider]
Yes Harmful to human health .
Sicariidae, Araneae, Arachnida, Arthropoda Loxosceles laeta
  [Chilean Recluse]
Yes Harmful to human health .
Sicariidae, Araneae, Arachnida, Arthropoda Loxosceles reclusa
  [Brown recluse]
Yes Harmful to human health . Native organism(s) affected: Human.
Hexathelidae, Araneae, Arachnida, Arthropoda Atrax spp.
  [Spiders of the genus Atrax]
Yes Potentially: Harmful to human health by toxin
Hexathelidae, Araneae, Arachnida, Arthropoda Hadronyche spp.
  [Spiders of the genus Hadronyche]
Yes Unknown impact.
Theridiidae, Araneae, Arachnida, Arthropoda Latrodectus tredecimguttatus
  [Mediterranean Black Widow Spider]
Yes Unknown impact.
Buthidae, Scorpiones, Arachnida, Arthropoda Buthidae spp.
  [Scorpions of the family Buthidae]
Yes Potentially: Venomous. Some species can be lethal to man. Dangerous spec ...
Cambaridae, Decapoda, Malacostraca, Arthropoda Orconectes rusticus
  [Rusty crayfish]
Yes Potentially: Competition and predationNative organism(s) affected: Vario ...
Astacidae, Decapoda, Malacostraca, Arthropoda Astacus astacus
  [Noble crayfish]
Yes Potentially: Predation, competition, and damage on aquatic flora.Native ...
Astacidae, Decapoda, Malacostraca, Arthropoda Astacus leptodactylus
  [Turkish crayfish]
Yes Potentially: Predation, competition, and damage on aquatic flora.Native ...
Parastacidae, Decapoda, Malacostraca, Arthropoda Cherax spp.
  [Crayfishes of genus Cherax]
Yes Potentially: Predation on native aquatic plants and animals, competition ...
Varunidae, Decapoda, Malacostraca, Arthropoda Eriocheir spp.
  [Mitten crabs]
Yes Potentially: Hybridization with native mitten crab E. japonica. Infestat ...
Portunidae, Decapoda, Malacostraca, Arthropoda Carcinus maenas
  [European green crab]
Potentially: predation on native molluscs, competition with native crabs ...
Dreissenidae, Veneroida, Bivalvia, Mollusca Dreissena polymorpha
  [Zebra mussel]
Yes Explosive infestation of this species cause inhibition of growth or suff ...
Dreissenidae, Veneroida, Bivalvia, Mollusca Dreissena bugensis
  [Quagga mussel]
Yes Possibly: Mass predation by filter feeding and changing the structure of ...
Higher Taxa Scientific name [Common Name] Legal control in Japan Potential impact

Mammals | Birds | Reptiles | Amphibians | Fishes | Insects | Invertebrates (except insects) | Plants | Miscellaneous