bull kelp
noun
mass noun
1- a very large brown seaweed found in Pacific and Antarctic waters, growing up to 50 m in length off the north-western coasts of North America牛藻, 太平洋巨藻。
1.1
- Nereocystis and other genera, class Phaeophyceae.海囊藻属及其他属, 褐藻纲。