Which one is known as largest algae?

Another algal contender are the massive mats of floating algae found in the Sargasso Sea : Monstrous in expanse, they can, under favourable conditions, even be seen from orbit ! Hope this helps. read more

Among the brown algae are the largest of all algae, the giant kelps, which may reach a length of over 100 ft (30 m). read more

represent the peak of evolutionary defelopment of the colony-type green algae; have soccer ball appearance Diatoms single celled organisms with extremely novel walls. is enclosed by two glassy walls that fit one over the other like two petri dishes. glassy shell made of silicon and pectin. read more