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) tonsa33
Eriocheir sinensis31
Codium fragile subsp. fragile29
Potamopyrgus antipodarum29
Mnemiopsis leidyi29
Callinectes sapidus28
Bonnemaisonia hamifera28
Rhithropanopeus harrisii28
Colpomenia peregrina27
Cordylophora caspia27
Magallana gigas27
Teredo navalis27
Melanothamnus harveyi25
Oncorhynchus mykiss25
Prorocentrum cordatum25
Styela clava25
Anguillicoloides crassus24
Crepidula fornicata23
Gracilaria vermiculophylla23
Caprella mutica22
Asparagopsis armata21
Karenia mikimotoi21
Sargassum muticum21
Botrylloides violaceus21
Ruditapes philippinarum20
Botryllus schlosseri20
Dasysiphonia japonica20
Diadumene lineata20
Gonionemus vertens20
Undaria pinnatifida19
Gammarus tigrinus18
Tricellaria inopinata18
Austrominius modestus18
Molgula manhattensis18
Antithamnionella ternifolia18
Amphibalanus eburneus18
Grateloupia turuturu18
Bugula neritina17
Marenzelleria neglecta17
Rapana venosa17
Pseudodiaptomus marinus16
Antithamnionella spirographidis16
Mytilopsis leucophaeata16
Ensis leei16
Bugulina stolonifera15
Palaemon macrodactylus15
Hemimysis anomala15
Ethmodiscus punctiger15
Odontella sinensis15
Dreissena polymorpha15
Neogobius melanostomus15
Hemigrapsus takanoi14
Alexandrium minutum14
Coscinodiscus wailesii14
Oncorhynchus gorbuscha14
Monocorophium sextonae14
Marenzelleria viridis14
Psiloteredo megotara14
Arcuatula senhousia14
Mercenaria mercenaria14
Petricolaria pholadiformis14
Chelicorophium curvispinum13
Caprella scaura13
Spartina townsendii var. anglica13
Oithona davisae13
Amphibalanus amphitrite13
Calyptospadix cerulea13
Acipenser baerii13
Didemnum vexillum13
Homarus americanus13
Jassa marmorata13
Beroe ovata13
Balanus trigonus13
Bonamia ostreae13
Corella eumyota13
Alexandrium tamarense13
Telmatogeton japonicus12
Grandidierella japonica12
Rangia cuneata12
Amathia verticillata12
Mytilicola intestinalis12
Heterosigma akashiwo12
Palaemon elegans12
Pseudodactylogyrus anguillae12
Platorchestia platensis11
Balanus amphitrite11
Diplosoma listerianum11
Procambarus clarkii11
Bugulina simplex11
Styela plicata11
Pileolaria berkeleyana11
Hydroides elegans11
Crassostrea virginica11
Pacifastacus leniusculus11
Penaeus (Marsupenaeus) japonicus11
Mytilus galloprovincialis11
Faxonius limosus11
Acipenser gueldenstaedtii10
Anotrichium furcellatum10
Boccardiella ligerica10
Watersipora subtorquata10
Penaeus aztecus10
Pseudopolydora paucibranchiata10
Hemigrapsus sanguineus10
Elodea canadensis10
Cyprinus carpio10
Polydora cornuta10