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Regional network

Marine non-indigenous species (NIS)

ALIEN Celtic Seas

To complete the information on non-indigenous species along all of mainland France’s coastlines, the association “Les Amis de BioObs” has put together, for the Celtic Seas area, a non-exhaustive list of the main non-indigenous species (NIS) that divers and shore naturalists can observe.

List put together by Les Amis de BioObs
Record my observationsSee the species to report
ALIEN Celtic Seas network logo
  • 75
    non-indigenous species monitored
  • 2
    observation approaches
  • 11
    taxonomic groups
  • 7
    ALIEN networks in France
Printable PDFFor signed-in members

The ALIEN Celtic Seas 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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Species to report

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

Showing 75 species (of 75)

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 Celtic Seas network and the indicators of the Marine Strategy Framework Directive (MSFD).
Create my survey

A question about an identification? Write to us.

The spirit of the network

This list is based on the knowledge available in the report “Évaluation du descripteur 2 ‘espèces non indigènes’ en France métropolitaine” (1), whose appendices 2 and 3 were updated in 2022.

All the observations recorded with BioObs should help:

  • provide accurate information on, and a watch over, the species observed;
  • follow how these species evolve over time and space;
  • better inform the indicators of the Marine Strategy Framework Directive (MSFD);
  • build a local partnership network.

(1) Massé C. and Guérin L. (2018). Évaluation du descripteur 2 « espèces non indigènes » en France métropolitaine. Scientific report for the 2018 MSFD assessment. Muséum national d’Histoire naturelle (UMS 2006 Patrimoine naturel), Dinard and Arcachon marine stations. 141 p.

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

The other ALIEN networks