Where is agar agar obtained from?

Agar-agar:

1. Agarose, a linear polysaccharide, and agaropectin, a heterogeneous combination of smaller molecules, are combined to form agar.
2. Agar, also known as agar-agar, is a jelly-like material made of polysaccharides that are extracted from some species of red algae's cell walls.
3. Algae is mostly of the genera Eucheuma, Gelidium, and Gracilaria.
4. These tiny algae are high in mucilage, a form of fiber, and have a reddish stem.
5. Once they have dried in the sun, they are retrieved by soaking in hot water.
6. It is utilized as a kind of cultural media.