1. Red Algae By: Carly Muller and Jess Lin

2. Description Around 6,000 species Few simple, unicellular – Majority complex, multicellular, and plant-like Body composed of interwoven filaments (feathery) Some have flattened sheets of cells Phylum: Phodophyta Attach to rocks by basal holdfast No flagella Reproduce in alternation of sexual and asexual stages

3. Pigmentation Chloroplasts contain Phycoerythrin – Provides red color by absorbing blue light and reflecting red – Allow to live deeper in ocean Same pigment composition as cyanobacteria

4. Uses Sticky polysaccharides in cell wall – Used to produce agar and as a food thickener Carrageenan: food additive to stabilize chocolate milk and for creamy texture in ice cream Eaten by fish, crustaceans, worms Help treat herpes simplex virus

5. Habitat Primarily warm tropical ocean waters – Some fresh water and soil – Most commonly in tide pools and coral reefs