Bathymetric map in French of the Celtic Sea and the Bay of Biscay. Limits of the seas as specified by the International Hydrographic Organization.Note: the background map is a raster image embedded in the SVG file.
Own work

Sources used:GEBCO_2019 Grid (public domain)
NGDC GSHHS (public domain)
EEA ECRINS (free)
IHO: Limits of oceans and seas, 4th edition in force in 2019
References:IHO-IOC GEBCO Undersea Feature Names Gazetteer (on NGDC's Website)
Marine Regions Gazetteer
IFREMER: Menot Lénaik et Van den Beld Inge, Nature, distribution et diversité des habitats de substrats durs du golfe de Gascogne, 2013
Université de Bretagne Occidentale: Charefeddine Assassi, Variabilité interannuelle et analyse de la turbulence géostrophique dans le golfe de Gascogne à partir de simulations, thèse, 2015
IFREMER: Sibuet Jean-Claude et al., Carte bathymétrique de l'Atlantique nord-est et du golfe de Gascogne, 2003-2004
IFREMER: Le Suavé Raymond et al., La marge nord du golfe de Gascogne, 2000
Université de Bretagne Occidentale: Mansor Sandra, Faciès sismiques et architecture du système turbiditique armoricain, 2004
Deep Sea Drilling Project: Montadert L. et al., Rifting and subsidence of the northern continental margin of the Bay of Biscay
Géosciences Montpellier: Lallemand Serge and Sibuet Jean-Claude, Tectonic implications of canyon directions over the northeast Atlantic continental margin, 1986
Université Bordeaux 1: Mas Virginie, Processus sédimentaires et conditions environnementales enregistrées sur la pente continentale du Golfe de Gascogne, 2004
Search and Discovery: D. Van Rooij et al., Neogene sedimentary processes of submarine channels, West off Ireland, 2009
NGA: Undersea features gazetteer, 2009
European Commission: Maratlas
Eric Gaba (Sting - fr:Sting)