1. Green algae: its algae is grass green. It has more than 6000 varieties, most of which grow in fresh water, and a small part grows on rocks.
2. Red algae: it generally grows in the ocean and has many species. The algae are rose red and purple red. Some of them are dark red. There are many red algae with good economic value.
3. Brown algae: This is what we usually call kelp. It is edible seaweed. It is a flat strip, sometimes about 20 m in length, brown
It is a tree species growing in the sea, and its growth height is also different, sometimes the height can reach about 5m. Their root system growth ability is very good, is also very developed, has the green crown, when the tide will submerge it, will only expose the crown on the sea.
As we all know, seaweed is a angiosperm growing under the sea. Its root system is also very developed, which can protect benthos well. It is similar to many terrestrial plants. It can't survive without sunshine.
