Laminaria and Fucus are examples of
Brown algae
Brown algae are the largest type of seaweed. Brown algae are in the phylum Phaeophyta, Examples of brown algae: kelp, rockweed (Fucus), Sargassum, Laminaria.
Red algae have its often brilliant colour due to the pigment phycoerythrin. Example of red algae: Irish moss, coralline algae, Chondrus.
Green algae may be found in marine or freshwater habitats, and some even thrive in moist soils. Examples of green algae: Sea lettuce.