The deepest seathe deepest sea in the world - Coral. It is in Pacific ocean. Its(his) maximal depth - 9174 meters. The sea of the world second on depth too in Pacific ocean. This Banda sea, with the maximal depth of 7440 meters. On the third place the deepest sea of Atlantic ocean - Caribbean. Depth - 7090 meters. In vicinities(environs) of Russia, the deepest sea - Beringovo. Its(his) depth reaches(achieves) 5500 meters.
If it is interesting, esteem also about the maximal depth of Black sea.