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  1. Seaweed - Wikipedia

    Seaweed, or macroalgae, refers to thousands of species of macroscopic, multicellular, marine algae. The term includes some types of Rhodophyta (red), Phaeophyta (brown) and …

  2. What Are Macroalgae? Types, Habitats, and Importance

    Aug 24, 2025 · Macroalgae, commonly known as seaweeds, are photosynthetic marine organisms. Unlike microscopic algae, these multicellular forms can range in size from a few …

  3. Macroalgae - an overview | ScienceDirect Topics

    Macroalgae popularly known as seaweeds are multicellular and macroscopic autotrophs which are taxonomically categorized in three distinct groups based on their color of the thallus: …

  4. Macro-Algae Portal Home

    This portal serves as: 1) a resource to advance algal research; 2) a data management and publishing platform for vouchered and observational algal specimen data, and 3) to provide …

  5. Macroalgae - MDPI

    Feb 6, 2021 · Macroalgae are aquatic photosynthetic organisms that do not constitute a defined taxonomic category, presenting organisms with different cellular organizations and a wide …

  6. Macroalgas: What are, types and examples - Evidence Network

    Jun 13, 2025 · Algae constitute a very diverse group that presents a great variety of shapes and sizes which cover from microscopic unicellular organisms (microalgae) to macroscopic …

  7. What are the key characteristics of macroalgae? – The Institute for ...

    Oct 11, 2025 · Macroalgae, commonly referred to as seaweed, are a diverse group of photosynthetic organisms found primarily in marine environments. They play a crucial role in …

  8. Macroalgae Definition - Marine Biology Key Term | Fiveable

    Macroalgae, also known as seaweeds, are large, photosynthetic organisms found in marine environments. They play a crucial role in marine ecosystems as primary producers, providing …

  9. Macroalgae - Coral Digest

    Macroalgae, or seaweed, are a group of diverse organisms in the algae family. They are divided by color into three major phyla; rhodophyta (red), chlorophyta (green), and ochrophyta (brown).

  10. Macroalgae or seaweeds are macroscopic marine algae that can reach several meters in length (some thalli of these algae can reach 65 m in length, if not subject to intense herbivory).