What are the features of the nature of the seas of the basins of different oceans?

Seas are internal, marginal. Arctic Ocean. Its seas (except for the White) are marginal. They are located on the shelf, so the depth is up to 200 m. The climate is harsh. Freeze up to 10 months. Ice up to 4 m. Ice drifts with the flow, faith, clockwise. The salinity is low. Passes there, the Northern Sea Route.
Pacific Ocean. The seas are marginal, deep. The shelf is almost absent. Territory of the Pacific Ring of Fire. Severe storms, tsunamis. The sea is Japanese, does not freeze.
Atlantic Ocean. All the seas are inland. They are connected by straits. The Black Sea is deep. Contaminated with hydrogen sulfide. It doesn’t freeze. Freeze Azov, Baltic.