The inshore hagfish , known as kkomjangeo ( 꼼장어 ) or meokjango ( 먹장어 ) in Korean and nuta-unagi ( ぬたうなぎ ) in Japanese , is the only member of the hagfish family with a seasonal reproductive cycle .
However , meat from the inshore hagfish ( a type of hagfish known as kkomjangeo ( 꼼장어 ) or meokjango ( 먹장어 ) in Korean and Nuta-unagi in Japanese ) is a popular food in Korea .