Which continents north or south have more indented coastlines?

The most indented coastlines are in the northern continents – North America and Eurasia. Eurasia is washed by four oceans and the greatest roughness of the coastline falls on the coast of the Atlantic Ocean. The largest number of peninsulas and straits falls on this region. In North America, the coastline of the Arctic Ocean has a more indented coastline. The difference in the unevenness of the contour of the coastlines happens due to the movement of the lithospheric plates.