The term "boulder fields" covers areas of boulders of the lowest levels of the foreshore which are uncovered during low tides. They are not really part of the mediolittoral (intertidal zone) but what is now defined as the fringe tip (or emerging or upper part) of the infralittoral. More generally, boulder fields, formed by the fragmentation of the rocks in place, are located at the foot of rocky cliffs or between rocky headlands and flats. They are only accessible on foot during tidal coefficients greater than or equal to 95. Boulder fields naturally harbor a high biodiversity due to their position at the bottom of the foreshore, but the wealth of fauna and flora also depends greatly on the type of architectural habitat. Three broad categories of boulder fields are distinguished: Sediment blocks, blocks of bedrock and blocks on blocks.

Map of benthic habitat synthesis of the Natura 2000 site FR5300015 - Bay of Morlaix is the result of the fusion and harmonization of five cartographic data. They were generated according to mapping strategies, interpretation scales and on the basis of different cartographic supports.

3D seasonal temperature range (in ° C) obtained by objective analysis (interpolation) of the raw data in situ, near the seafloor. Within the Bay of Biscay Challenge and the programme of the Operational Coastal Oceanographic Centre Prévimer, the services of SISMER DYNECO-PHYSED of IFREMER have built a joint hydrological database of the Bay of Biscay, from CTD measurements, Bouteilles, XBT / MBT and Profileurs from multiple global data centres to achieve a climatological atlas of the region for temperature and salinity.

Distribution of benthic invertebrate species in Atlantic based on cumulative and interpolated relative abundance density data from fisheries surveys EVHOE (2008-2013), LANGOLF (2011-2013), NURSE (2000-2013), ORHAGO (2011-2015)

Seasonal spatial distribution of gray seals (Halichoerus grypus) on their haul out sites identified by the ONCFS on the rocks of Portsall in 2010.

Location distribution per grid cell of 8 young harbor seals (Phoca vitulina), followed by Argos tags (between 2005 and 2008) along the English Channel coast following rehabilitation at the care center CHENE.

The statistical analysis used (Principal Component Analysis followed by a classification method) to identify groups common to all months and describe the evolution of these groups during the year. The data used allows for monthly tables showing the selected parameters, calculated over the entire geographic area with a resolution of 0.1 °. This method identifies 10 hydrological landscapes present at various times of the year, and characterized by homogeneous hydrological conditions.

The analysis focuses on monitoring the ecological status of the coastal and transitional waters of the Western Channel and the Bay of Biscay. The ecological status of a coastal water body within the meaning of the European Water Framework Directive (WFD) is determined by the biological state, physicochemical state and hydromorphological state of the water mass, water. The statement is determined according to the rules described in the decree of 25 January 2010.