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Regional network

Marine non-indigenous species (NIS)

ALIEN-Corsica

The introduction (often accidental) of species from outside the Mediterranean is an ongoing phenomenon. Not all of these species are a problem, but they can become one when they establish populations, spread in the wild in a new environment and become invasive.

Record my observationsSee the species to report
ALIEN-Corsica network logo
  • 45
    non-indigenous species monitored
  • 2
    observation approaches
  • 9
    taxonomic groups
  • 7
    ALIEN networks in France
Printable PDFFor signed-in members

The ALIEN-Corsica species leaflet

All the species of the network in a printable document, to take diving or along the shore: photo, name, group, number of observations in the network and tick boxes.

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Free sign-up (in French)

Species to report

Two complementary approaches: on foot along the shore and the strandline, or underwater — scuba diving, snorkelling and freediving.

Showing 45 species (of 45)

How do I take part?

  1. I observe

    While scuba diving, snorkelling, freediving or on foot along the shore and the strandline.

  2. I take a photo

    A photo, even an imperfect one, lets the validator confirm the identification.

  3. I record my survey

    In my BioObs logbook: species, habitat, date and place.

  4. The data travels on

    Once validated, it feeds the ALIEN Corsica network and national programmes.
Create my survey

A question about an identification? Write to us.

The spirit of the network

Within the goals of the ALIEN Corsica network, prevention means informing people about the species to look for (hoping not to find them) and also, once a species has been reported, watching how it behaves.

Your reports on BioObs contribute to this active watch over our underwater environment.

Read the definition on the OPEN participatory science portal (in French) (opens in a new tab)

The other ALIEN networks