Most widespread species

This option provides the list of non-indigenous and cryptogenic species which were recorded in 10 or more recipient countries worldwide. This data is being retrieved from the records, which currently are in the AquaNIS public domain. Currently our listing is mostly for European regional seas, including also other marine regions, for which some data exist in AquaNIS (e.g. East Asia, New Zealand shelf, Canadian Arctic…).

Note: There is more information on species biology, introduction events, etc. which can be obtained using the AquaNIS "Advanced search" function.
SpeciesNumber of introduced countries
Mya arenaria36
Amphibalanus improvisus35
Ficopomatus enigmaticus33
Acartia (Acanthacartia) tonsa32
Eriocheir sinensis31
Codium fragile subsp. fragile29
Mnemiopsis leidyi29
Callinectes sapidus28
Teredo navalis28
Potamopyrgus antipodarum28
Cordylophora caspia28
Prorocentrum cordatum27
Rhithropanopeus harrisii27
Colpomenia peregrina26
Oncorhynchus mykiss26
Magallana gigas26
Melanothamnus harveyi25
Bonnemaisonia hamifera25
Styela clava25
Anguillicoloides crassus24
Crepidula fornicata23
Gracilaria vermiculophylla23
Caprella mutica22
Sargassum muticum21
Diadumene lineata21
Botrylloides violaceus21
Karenia mikimotoi21
Asparagopsis armata21
Ruditapes philippinarum21
Dasysiphonia japonica20
Gonionemus vertens20
Botryllus schlosseri19
Undaria pinnatifida19
Tricellaria inopinata18
Antithamnionella ternifolia18
Molgula manhattensis18
Gammarus tigrinus18
Rapana venosa17
Austrominius modestus17
Grateloupia turuturu17
Bugula neritina17
Amphibalanus eburneus17
Ensis leei16
Antithamnionella spirographidis16
Neogobius melanostomus15
Pseudodiaptomus marinus15
Hemimysis anomala15
Odontella sinensis15
Palaemon macrodactylus15
Marenzelleria neglecta15
Bugulina stolonifera15
Mytilopsis leucophaeata15
Dreissena polymorpha15
Oncorhynchus gorbuscha15
Mercenaria mercenaria14
Petricolaria pholadiformis14
Monocorophium sextonae14
Alexandrium minutum14
Marenzelleria viridis14
Alexandrium tamarense14
Hemigrapsus takanoi14
Coscinodiscus wailesii14
Ethmodiscus punctiger14
Psiloteredo megotara14
Balanus trigonus13
Caprella scaura13
Jassa marmorata13
Didemnum vexillum13
Chelicorophium curvispinum13
Spartina townsendii var. anglica13
Acipenser baerii13
Corella eumyota13
Beroe ovata13
Bonamia ostreae13
Homarus americanus13
Amphibalanus amphitrite13
Mytilicola intestinalis12
Palaemon elegans12
Balanus amphitrite12
Pseudodactylogyrus anguillae12
Calyptospadix cerulea12
Penaeus (Marsupenaeus) japonicus12
Telmatogeton japonicus12
Amathia verticillata12
Grandidierella japonica12
Heterosigma akashiwo12
Rangia cuneata12
Blackfordia virginica12
Oithona davisae12
Diplosoma listerianum11
Pileolaria berkeleyana11
Platorchestia platensis11
Mytilus galloprovincialis11
Pacifastacus leniusculus11
Pseudosolenia calcar-avis11
Procambarus clarkii11
Crassostrea virginica11
Styela plicata11
Faxonius limosus11
Bugulina simplex11
Arcuatula senhousia11
Watersipora subtorquata10
Anotrichium furcellatum10
Hemigrapsus sanguineus10
Elodea canadensis10
Cyprinus carpio10
Acipenser gueldenstaedtii10
Pseudopolydora paucibranchiata10
Hydroides elegans10
Boccardiella ligerica10