Meristotheca papulosa

Meristotheca papulosa (synonyms: M. japonica and Eucheuma papulosa) is a red alga, popular as a sea vegetable in Taiwan, where it is known as jiguancai (Chinese:鸡冠菜; pinyin:jīguāncài, literally "cockscomb vegetable"), and in Japan, where it is known as tosaka-nori (Japanese:トサカノリ).