____, aka ‘seaweed’, comes in red, green and brown.

noun

1. Any of a diverse group of chiefly photosynthetic and aquatic plantlike organisms that range from unicellular to large multicellular forms, are typically classified as protists, and include the green, yellow-green, brown, golden-brown, and red algae in the eukaryotes and especially formerly the cyanobacteria in the prokaryotes

   "… the divers were witnessing the collapse of the delicate symbiotic relationship between the coral animals and the single-celled photosynthetic algae, called zooxanthellae, that normally flourish within them."

noun

1. Cyanobacterium

noun

1. Any of a division (Phaeophyta) of variable mostly marine algae with chlorophyll masked by brown pigment

noun

1. Any of a division (Chrysophyta) of marine and freshwater algae (such as diatoms) containing yellowish-green to golden-brown pigments that obscure the chlorophyll

noun

1. Any of a division (Chlorophyta) of green-colored algae that have chloroplasts and occur especially in fresh water

noun

1. Any of a division (Rhodophyta) of chiefly marine algae that have predominantly red pigmentation

noun

1. Any of a class (Xanthophyceae of the division Chrysophyta) of algae with the chlorophyll masked by brown or yellow pigment

noun

1. Any of a major group (Cyanobacteria) of photosynthetic bacteria that are single-celled but often form colonies in the form of filaments, sheets, or spheres and are found in diverse environments (such as salt and fresh water, soils, and on rocks)