How much salinity are in a ocean biome?

Ocean biomes typically have a salinity range of about 30 to 37 parts per thousand (ppt), which translates to 3% to 3.7% salt content. This salinity can vary depending on factors like location, depth, and proximity to freshwater sources. Coastal areas may have lower salinity due to river inputs, while more isolated regions, like the open ocean, may have higher salinity levels. Overall, the average salinity of ocean water is approximately 35 ppt.