The Legal Protection of the Sea Environment within Italian and International Law - Actually sea fishing has such economic, social and ecological dimensions that it’s in the middle of political debate. It may be considered an "integrated system" among national, european and international environmental policies. The necessity of protection of sea environment and of preserving biological resources has given an important role to the principle of precaution among sea fishing. The work is particularly focus on the analysis of the international Treaties about sea fishing - first of all the code of behaviour for a sustainable sea fishing - and analyses its repercussions on community policy about sea fishing. Key words: sea fishing, international Treaties, principle of precaution.