A fjord is a long, narrow inlet with steep sides or cliffs, created by a glacier. Fjords are found mainly in Norway, Chile, New Zealand, Canada, Greenland, and the U.S. state of Alaska. They provide unique environmental conditions for phytoplankton communities. In polar fjords, glacier and ice sheet outflow add cold, fresh meltwater along with transported sediment into the body of water. Nutrients provided by this outflow can significantly enhance phytoplankton growth.

https://en.wikipedia.org/wiki/Fjord
https://education.nationalgeographic.org/resource/fjord/

WHAT IS A FJORD – HOW THE SOGNEFJORD WAS FORMED

https://www.fjordnorway.com/en/inspiration/what-is-a-fjord