Seaweed (Mogake)

Teapots that have seaweed pattern are called "Mogake" or "Mogake teapot" in Japan.

What is Mogake?
https://shihateacomfort.com/hakusanmogakestory

Mogake Technique
https://shihateacomfort.com/japanese-teapot-with-seaweed-pattern-soil-and-oceans-beauty