Abstract

EXTRA-CELLULAR PRODUCT anti-biofouling against marine invertebrates which are common to the biofouling, which contains an extract of the supernatant of an Alteromonas sp. Culture. Anti-biofouling composition, comprising, said extra-cellular product and a biopolymer. The use of said extra-cellular product for preparing a composition useful for inhibiting the marine micro-and macro-biofouling, and the process for preparing said extra - cellular product.