The first recorded occurrences of the invasive crab Callinectes sapidus Rathbun, 1896 (Crustacea: Decapoda: Portunidae) in coastal lagoons of the Balearic Islands (Spain)

First record of the non-native jellyfish Chrysaora cf. achlyos (Cnidaria: Pelagiidae) in the Mediterranean Sea

Everywhere you look, everywhere you go, there's an estuary invaded by the red seaweed Gracilaria vermiculophylla (Ohmi) Papenfuss, 1967

New record of monogenean parasites on non-indigenous fishes in the Ukrainian Danube Delta

Non-native species in the Three Gorges Dam Reservoir: status and risks

Redclaw crayfish, Cherax quadricarinatus (von Martens, 1868), widespread throughout Indonesia

Sometimes they come back: the re-colonization of the alien seagrass Halophila stipulacea (Forsskal) Ascherson, 1867 (Hydrocharitaceae) in the Palinuro Harbor (Tyrrhenian Sea, Italy)

Status of the invasive brackish water bivalve Mytilopsis leucophaeata (Conrad, 1831) (Dreissenidae) in the Ponto-Caspian region

On the importance of citizen-science: the first record of Goniobranchus obsoletus (Ruppell and Leuckart, 1830) from Cyprus (Mollusca: Gastropoda: Nudibranchia)

The diet of an invasive crayfish, Cherax quadricarinatus (Von Martens, 1868), in Lake Kariba, inferred using stomach content and stable isotope analyses

First records of the fish Abudefduf sexfasciatus (Lacepede, 1801) and Acanthurus sohal (Forsskal, 1775) in the Mediterranean Sea

The alien fissurellid Diodora ruppellii (G. B. Sowerby I, 1835): a first record for Libya from Tripoli Harbour

First records of the mourning gecko (Lepidodactylus lugubris Dumeril and Bibron, 1836), common house gecko (Hemidactylus frenatus in Dumeril, 1836 and Tokay gecko (Gekko gecko Linnaeus, 1758) on Curacao, Dutch Antilles, and remarks on their Caribbean distributions

First record of Aplysia dactylomela Rang, 1828 (Mollusca: Gastropoda) in Libyan coastal waters

First record of an established marbled crayfish Procambarus virginalis (Lyko, 2017) population in Estonia

First record of the Atlantic blue crab Callinectes sapidus Rathbun, 1896 (Decapoda: Brachyura: Portunidae) in Algerian coastal waters (southwestern Mediterranean)

First documented record of the invasive cockle Fulvia fragilis (Forsskal in Niebuhr, 1775) (Mollusca: Bivalvia: Cardiidae) in Libya

Distribution of the invasive calanoid copepod Pseudodiaptomus marinus (Sato, 1913) in the Belgian part of the North Sea

Dipterygonotus balteatus (Valenciennes, 1830) (Teleostei: Caesionidae), a new alien fish in the Mediterranean Sea

Life-history traits of the invasive mosquitofish (Gambusia affinis Baird and Girard, 1853) in the central Yangtze River, China

An established population of African clawed frogs, Xenopus laevis (Daudin, 1802), in mainland China

Caesio varilineata Carpenter, 1987 (Osteichthyes: Caesionidae) a new alien fish in the southeastern Mediterranean Sea

First record of Aedes (Stegomyia) aegypti (Linnaeus, 1762) (Diptera: Culicidae) in Botswana

First confirmed record of the white-spotted puffer Arothron hispidus (Linnaeus, 1758) in the Mediterranean Sea

The Balkans invaded - first record of Ophraella communa LeSage, 1986 (Coleoptera: Chrysomelidae) in Croatia

New records of alien and cryptogenic marine bryozoan, mollusc, and tunicate species in Libya

Updating the distribution data of recently introduced freshwater fish in the Guadalquivir River Basin (Spain)

Is the mangrove red snapper Lutjanus argentimaculatus (Forsskal, 1775) established in the eastern Mediterranean Sea? First records from Greece through a citizen science project

One of the most invasive alien species, Penaeus aztecus Ives, 1891 reached the Black Sea coasts

New records of non-indigenous molluscs from the eastern Mediterranean Sea

Settlement of non-native Watersipora subtorquata (d'Orbigny, 1852) in artificial collectors deployed in Colombo Port, Sri Lanka

First record of the non-indigenous Indo-Pacific damselfish, Neopomacentrus cyanomos (Bleeker, 1856) in the northern Gulf of Mexico

The spread of the parthenogenetic mourning gecko, Lepidodactylus lugubris (Dumeril and Bibron, 1836) to Paradise Island, The Bahamas, with comments on citizen science observations of non-native herpetofauna

Detection of alien Pelophylax species in Sardinia (western Mediterranean, Italy)

First detection of a highly invasive freshwater amphipod Crangonyx floridanus (Bousfield, 1963) in the United Kingdom

New distributional records of the exotic land snail Bradybaena similaris (Ferussac, 1822) (Gastropoda, Bradybaenidae) in Argentina

First record of the alien invasive biofouling mussel Mytella strigata (Hanley, 1843) (Mollusca: Mytilidae) from Indian waters

Balkan marsh frogs Pelophylax kurtmuelleri (Gayda, 1940) introduced in the Aspromonte National Park, southern Italy

First record of Monocorophium uenoi (Stephenson, 1932) (Crustacea: Amphipoda: Corophiidae) in the Bay of Biscay, French Atlantic coast

Desalination effluents and the establishment of the non-indigenous skeleton shrimp Paracaprella pusilla Mayer, 1890 in the south-eastern Mediterranean

The occurrence of the peacock bass (Cichla kelberi Kullander and Ferreira, 2006) in Lake Kinneret (Sea of Galilee), Israel

Rapid invasion of the American blue crab Callinectes sapidus Rathbun, 1896 in the North-East of the Iberian Peninsula

The Atlantic blue crab Callinectes sapidus Rathbun, 1896 expands its non-native distribution into the Ria Formosa lagoon and the Guadiana estuary (SW-Iberian Peninsula, Europe)

On the occurrence of the blue crab Callinectes sapidus (Rathbun, 1896) in Sardinian coastal habitats (Italy): a present threat or a future resource for the regional fishery sector?

Chromolaena odorata invasion in Guinea-Bissau (West Africa): first records and trends of expansion

The beginnings of Pistia stratiotes L. invasion in the lower Danube delta: the first record for the Province of Vojvodina (Serbia)

A decade of invasion: changes in the distribution of Didemnum vexillum Kott, 2002 in Narragansett Bay, Rhode Island, USA, between 2005 and 2015

Distribution patterns of the early invasion of zebra mussels, Dreissena polymorpha (Pallas, 1771), in the south basin of Lake Winnipeg

Mytella strigata (Hanley, 1843) emerging as an invasive marine threat in Southeast Asia

First DNA barcoding based record of Echinogammarus trichiatus (Martynov, 1932) (Crustacea, Gammaridae) in Belarus