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Red algae
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Close-up of marine red algae Asparagopsis armata, showing dense, feathery, bright red fronds underwater. Diagram illustrating the life cycle of the red alga Polysiphonia, showing stages including tetrasporangium, tetraspores, male and female gametophytes, spermatangia, carpospore, cystocarp, and carposporophyte, with arrows indicating the sequence and transitions between reproductive phases.
Bright green algae blooms distort the surface of water.
Irish moss An edible seaweed representative algae
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Red algae: Media

division of algae
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What Causes Algae Blooms?
Algae blooms can make lakes and oceans look like abstract paintings.
Video: Encyclopædia Britannica, Inc.

Images

red algae
Red algae.
© damedias/stock.adobe.com
red algae
The life cycle of the red alga Polysiphonia.
Encyclopædia Britannica, Inc.
Irish moss
Irish moss (Chondrus crispus).
Kontos
An edible seaweed
Dulse (Palmaria palmata), an edible red alga. Dulse grows along the northern...
Julian Cremona, www.theseashore.org.uk
representative algae
Representative algae.
Encyclopædia Britannica, Inc.
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