Algae
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Algae are any of a large and diverse group of photosynthetic organisms. It excludes the land plants. Such organisms range from microscopic unicellular microalgae to seaweeds, multicellular macroalgae
Marine algae growing on the sea bed in shallow waters
Freshwater microscopic unicellular and colonial algae
False-color scanning electron micrograph of the unicellular coccolithophore Gephyrocapsa oceanica
The kelp forest exhibit at the Monterey Bay Aquarium: A three-dimensional, multicellular thallus
Red algae
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Red algae, or Rhodophyta, 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. The major
Algae
…with chloroplasts that have three or more membranes evolved from protists that acquired photosynthesis after engulfing archaeplastids. Chlorophytes, rhodophytes (red algae) and glaucophytes (grey algae) have primary chloroplasts directly derived from endosymbiont cyanobacteria, while diatoms, cryptomonads…
Sea grapes 2
Stylonemaalsidii
Red seaweed, Galaxaura rugosa, Daedalus Reef, Red Sea, Egypt
Porphyra umbilicalis Helgoland