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
Teredo navalis29
Potamopyrgus antipodarum28
Callinectes sapidus28
Cordylophora caspia28
Prorocentrum cordatum27
Rhithropanopeus harrisii27
Colpomenia peregrina26
Magallana gigas26
Oncorhynchus mykiss26
Melanothamnus harveyi26
Bonnemaisonia hamifera25
Styela clava25
Anguillicoloides crassus24
Agarophyton vermiculophyllum23
Crepidula fornicata23
Caprella mutica22
Diadumene lineata21
Ruditapes philippinarum21
Asparagopsis armata21
Sargassum muticum21
Botrylloides violaceus21
Karenia mikimotoi21
Dasysiphonia japonica20
Gonionemus vertens20
Undaria pinnatifida19
Botryllus schlosseri19
Tricellaria inopinata18
Antithamnionella ternifolia18
Gammarus tigrinus18
Molgula manhattensis18
Rapana venosa17
Austrominius modestus17
Grateloupia turuturu17
Amphibalanus eburneus17
Bugula neritina17
Ensis leei16
Antithamnionella spirographidis16
Bugulina stolonifera15
Palaemon macrodactylus15
Marenzelleria neglecta15
Mytilopsis leucophaeata15
Neogobius melanostomus15
Hemimysis anomala15
Pseudodiaptomus marinus15
Odontella sinensis15
Oncorhynchus gorbuscha15
Dreissena polymorpha15
Petricolaria pholadiformis14
Alexandrium minutum14
Marenzelleria viridis14
Coscinodiscus wailesii14
Mercenaria mercenaria14
Alexandrium tamarense14
Ethmodiscus punctiger14
Hemigrapsus takanoi14
Monocorophium sextonae14
Psiloteredo megotara14
Balanus trigonus13
Didemnum vexillum13
Jassa marmorata13
Beroe ovata13
Amphibalanus amphitrite13
Corella eumyota13
Spartina townsendii var. anglica13
Homarus americanus13
Chelicorophium curvispinum13
Acipenser baeri13
Caprella scaura13
Bonamia ostreae13
Balanus amphitrite12
Rangia cuneata12
Amathia verticillata12
Grandidierella japonica12
Penaeus japonicus12
Blackfordia virginica12
Pseudodactylogyrus anguillae12
Telmatogeton japonicus12
Heterosigma akashiwo12
Palaemon elegans12
Mytilicola intestinalis12
Oithona davisae12
Pileolaria berkeleyana11
Bugulina simplex11
Garveia franciscana11
Procambarus clarkii11
Platorchestia platensis11
Pseudosolenia calcar-avis11
Crassostrea virginica11
Pacifastacus leniusculus11
Styela plicata11
Faxonius limosus11
Diplosoma listerianum11
Arcuatula senhousia11
Hydroides elegans10
Mytilus galloprovincialis10
Acipenser gueldenstaedtii10
Boccardiella ligerica10
Cyprinus carpio10
Hemigrapsus sanguineus10
Anotrichium furcellatum10
Elodea canadensis10
Pseudopolydora paucibranchiata10
Watersipora subtorquata10