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Also known as alga, algal, algæ

Algae ( , ; : alga ) are any of a large and diverse group of photosynthetic organisms. It excludes the land plants (embryophytes). Such organisms range from microscopic unicellular microalgae (including cyanobacteria and phytoplankton) to seaweeds, multicellular macroalgae which may grow up to in length. Most algae are aquatic (especially marine), and some form cohesive colonies. Freshwater algae include Charophyta such as the filamentous Spirogyra and the grasslike stoneworts. Most algae are planktons carried passively by water, although some macroalgae have holdfasts for anchorage.

AI overview

Algae are a diverse group of photosynthetic organisms that live mostly in water, ranging from microscopic single cells to large seaweeds that can grow many meters long. They play a fundamental role in aquatic ecosystems as primary producers, converting sunlight into energy that supports life in oceans and freshwater environments.

AI-generated from the Wikipedia summary — may contain errors.