Red algae, in the division Rhodophyta, are one of the oldest and largest groups of eukaryotic algae, comprising over 7,000 currently recognized species. Red algae are abundant in marine habitats but relatively rare in freshwater environments.
Despite their name, red algae can vary greatly in color from bright green, soft pink, resembling brown algae, to shades of red and purple, and may be almost black at greater depths. Red algae can have various forms: flat, membranous, balloon- or tongue-like, fork-branched, gelatinous, branching, epiphytic or encrusting.
F*CK FISH 