Isohaline: lines of equal salinity, in the ocean or lakes.

What is the name used for lines of equal salinity drawn on a map?

Complete answer: Isohaline is the line on a map of the ocean connecting all points of equal salinity.

What is Isopleths map?

Isopleth maps simplify information about a region by showing areas with continuous distribution. Isopleth maps may use lines to show areas where elevation, temperature, rainfall, or some other quality is the same; values between lines can be interpolated.