Exopolysaccharide produced by pseudoaltermonas sp. useful for the treatment and care of the skin, mucous membranes, hair and/or nails

Exopolysaccharide of a bacterial strain for the treatment and/or care of the skin, mucous membranes, hair and/or nails, as well as its cosmetic and/or dermopharmaceutical compositions. In particular, for the aging of skin and for the treatment and/or care of disorders, conditions and/or diseases which are a result of a lack or decrease in hydration.