Home›Seaweeds and Macroalgae›Red Algae (Rhodophyta)GroupRed Algae (Rhodophyta)Red algae owe their color to the pigment phycoerythrin, which reflects red light and absorbs blue light. Because blue light penetrates water to a greater depth than light of longer wavelengths, these pigments let red algae photosynthesize at somewhat greater depths than most other algae. Some have very little phycoerythrin and look green or bluish. In Asia they are important sources of food such as nori, which has been cultivated in Japan for more than 300 years. The coralline algae secrete a hard carbonate shell and have helped build tropical reefs for millions of years, contributing more to some Pacific atolls than corals did.Browse BySourcesComments (0)Reader Challenges (0)Browse ByAll Red Algae (Rhodophyta)Red Algae (Rhodophyta)7 entriesRed Algae (Rhodophyta)Filter Results7 entriesCommon GroupAllRed Algae (Rhodophyta) (7)TaxonomyAllFlorideophyceae (3)Plantae (1)Rhodophyta (3)HabitatAllCoral Reef (1)Freshwater (1)Intertidal Zone (4)Conservation StatusAllNot Evaluated (4)EcosystemAllCoral Reef Systems (1)Kelp Forests (1)Everyday GroupAllRed Algae (Rhodophyta) (7)DietAllPhotosynthetic Autotroph (6)System (Realm)AllFreshwater (1)Marine (6)Marine and Freshwater (1)Relationship to PeopleAllEaten or Drunk by People (3)Farmed or Commercially Raised (1)Living or ExtinctAllYes (4)Where It LivesAllCanada (1)Denmark (4)Ireland (1)Japan (1)Norway (4)Portugal (1)Sweden (4)United States (2)Show ResultsBrowseCompareSelect all 7Chondrus CrispusSeaweeds and Macroalgae2 linksCoralline AlgaeSeaweeds and Macroalgae4 linksDulseSeaweeds and Macroalgae2 linksIrish MossSeaweeds and Macroalgae2 linksNoriSeaweeds and Macroalgae1 linkPorphyra UmbilicalisSeaweeds and Macroalgae1 linkRed AlgaeSeaweeds and Macroalgae3 linksSourcesUC Museum of Paleontology: Introduction to the RhodophytaUC Museum of PaleontologyIntroduction to the RhodophytaQuote, Introduction to the RhodophytaRed algae are red because of the presence of the pigment phycoerythrinView the SourceWikidata: Irish MossHas Member: Chondrus Crispus, LeadQuote, Has Member: Chondrus Crispus, LeadChondrus crispus-commonly called Irish moss or carrageenan moss (Irish carraigín, "little rock"), is a species of red algae which grows abundantly along the rocky parts of the Atlantic coasts of Europe and North America.View the SourceWikipedia: Coralline algaetier 2WikipediaHas Member: Coralline Algae, LeadQuote, Has Member: Coralline Algae, LeadCoralline algae are red algae in the order Corallinales, characterized by a thallus containing calcareous deposits within its cell walls, giving it hardness.View the SourceWikipedia: NoriHas Member: Nori, LeadQuote, Has Member: Nori, LeadNori (Japanese: 海苔) is a dried edible seaweed used in Japanese cuisine, usually made from species of the red algae genus Pyropia, including P. yezoensis and P. tenera.View the SourceRed algae, WikipediaHas Member: Red Algae, LeadQuote, Has Member: Red Algae, LeadRed algae, or Rhodophyta (, ; from Ancient Greek ῥόδον (rhódon) 'rose' and φυτόν (phutón) 'plant'), make up one of the oldest and largest phyla of eukaryotic algae, containing over 7,000 recognized species within over 900 genera amidst ongoing taxonomic revisions.View the SourceWikipedia: Palmaria palmatatier 2WikipediaHas Member: Dulse, LeadQuote, Has Member: Dulse, LeadPalmaria palmata, also called dulse, dillisk or dilsk (from Irish/Scottish Gaelic duileasc/duileasg), red dulse, sea lettuce flakes, or creathnach, is a red alga (Rhodophyta) previously referred to as Rhodymenia palmata.View the SourceWikipedia: Porphyra umbilicalistier 2WikipediaHas Member: Porphyra Umbilicalis, LeadQuote, Has Member: Porphyra Umbilicalis, LeadPorphyra umbilicalis, commonly known as laver, is a species of seaweed in the genus Porphyra.View the SourceWikipedia: Chondrus crispustier 2WikipediaHas Member: Irish Moss, Lead, groupQuote, Has Member: Irish Moss, Lead, groupis a species of red algaeView the SourceComments (0)No comments yet. Be the first to share a thought.Sign in to join the discussion.Reader Challenges (0)No disputes yet. Spotted an error or a better source? Open the first one.Sign in to dispute this or suggest a correction.