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Cetacean

Updated on 04/12/2018
Définition
Sens commun
Aquatic mammal with front flippers and a horizontal caudal fin – the tail -. For example, whales, sperm whales and dolphins are cetaceans
Source
according to the Robert dictionary

Seawater

Updated on 06/09/2018
Définition
Sens commun
Water from oceans and seas, characterised by having higher salinity and density than freshwater.
Source
according to the Adour-Garonne Water Agency

Oceanography

Updated on 06/09/2018
Définition
Sens commun
Study of the marine environment and ocean floor.
Source
according to the National Centre for Textual and Lexical Resour

Ballast water

Updated on 25/02/2019
Définition
Sens commun
Water contained in large tanks that can correct the trim of the boat and its balance. Ballast water is a problem during the emptying of the tank (deballasting) because species living in one part of the world are released into another zone, creating ecological disturbances. With the growth of international trade, and especially transoceanic maritime transport, problems arise because of this contribution of living organisms foreign to the local environment. Now, biological and chemical treatment systems must treat these volumes of water to limit the exchange of invasive species.
Source
according to ASTEE

Marine turbine

Updated on 04/12/2018
Définition
Sens commun
Submerged turbine that uses the energy of marine currents, and sometimes fluvial, to produce electricity.
Source
according to CELF

Amphidromous

Updated on 08/07/2019
Définition
Sens commun

Refers to fish that migrate from river waters to the sea or vice versa, once or several times during their lifetime. We can distinguish anadromous species that migrate up rivers to reproduce and catadromous species that most often live in fresh water and will reproduce at sea.

Source
according to Larousse dictionary and IOWater

Echinoderm

Updated on 04/07/2018
Définition
Sens commun
Marine animal characterized by a fivefold radial symmetry, protected, depending on the species, by calcareous spikes or more or less developed calcite plates. Echinoderms include the starfishes, crinoid (sea daffodil), sea urchins, sea cucumbers and brittle stars. They have tubular "feet" and are able to move (very) slowly.
Source
According to the Ministry of Agriculture and IOWater

Wave

Updated on 13/07/2018
Définition
Sens commun
Periodic oscillation of sea level. The wave occurs sporadically, depending on the uneven pressures and on the wind friction that these differences in pressure generate. Waves (or chops), formed by the local wind, are random and, therefore, their action on the shore is negligible on the average.
Source
According to Rhone-Mediterranean and Corsica Water Agency

Open sea

Updated on 13/07/2018
Définition
Sens commun
Part of the sea where there is no more land marker.
Source
According to Ifremer

Sea

Updated on 19/06/2018
Définition
Sens commun
All salt waters covering the submerged part of the Earth. Is opposite to earth. The enclosed inland bodies of water, even salted (Caspian Sea, Dead Sea, Aral Sea), despite their name, are not considered as belonging to the sea.
Source
According to the International Hydrographic Organization

Ocean

Updated on 13/07/2018
Définition
Sens technique
According to the hydrological meaning, a thin water layer that covers part of the Earth. In the geophysical sense, it means the areas where this water layer of several kilometres thick covers grounds where the crust is composed of basalt or related materials and not of continental materials (granites, etc). Therefore shelf seas or epicontinental seas are not part of the ocean in the geophysical sense.
Source
According to Ifremer

Marine current

Updated on 27/02/2019
Définition
Sens commun

Movement of an oceanic water body.

Source
d'après IFREMER