What changes can occur on the surface of the Earth if the ice sheet in Antarctica begins to melt rapidly?

Due to the rapid melting of the Antarctic ice sheet, the first change will be changes in the salinity of the world’s oceans, due to which most mammals, fish and other ocean inhabitants can become extinct. Another major change in the ocean will be an increase in the average sea level by several meters, due to which most coastal areas, islands, countries, as well as cities that are located in the lowlands will be under a large layer of water, and living in this area will become impossible.