Fishcake is called "eomuk" or "odeng" (a wrong expression derived from Japanese word, "oden") in Korea.
If you are visiting Korea, it is a good idea to try street food.
Especially, eomuk is the typical street food in Korea.
It is usually a mild taste, but depending on what you put seasoning, it is also very hot.
The eomuk shown in this photo now has a spicy taste.
The ingredients of fish paste are fish flesh.
In Korean eomuk, Busan eomuk is especially famous.
By the way, Busan eomuk can be enjoyed not only in Busan but also in all parts of Korea including Seoul.