Zooxanthellae

Some articles on zooxanthellae:

Coral Bleaching
... endosymbionts (Symbiodinium, also known as zooxanthellae) through either expulsion or loss of algal pigmentation ... Zooxanthellae give coral its coloration, with the specific color depending on the particular clade ... Under stress, corals may expel their zooxanthellae, which leads to a lighter or completely white appearance, hence the term "bleached" ...
Gorgonian - Ecology
... Some gorgonians contain algae, or zooxanthellae ... Gorgonians possessing zooxanthellae are usually characterized by brownish polyps ... Those without zooxanthellae usually have more brightly colored polyps ...
Acropora - Threats
... Zooxanthellae, symbiotic algae, live in the corals' cells and produce energy for the animals through photosynthesis ... Bleaching is due to the loss of the coral's zooxanthellae, which are a golden-brown color ... Bleached corals are stark white and may die if new zooxanthellae cannot be assimilated ...
Elkhorn Coral
... brown to a yellowish-brown as a result of the symbiotic zooxanthellae living inside the tissue of this coral species ... Zooxanthellae are a type of algae which photosynthesize to provide the coral with nutrients ... The zooxanthellae are also capable of removing waste products from the coral ...
Southeast Asian Coral Reefs - Bleaching
... This algae is called zooxanthellae ... Zooxanthellae densities are continually changing bleaching is really an extreme of what naturally happens ... Once the zooxanthellae are expelled the coral have nothing to feed off and die ...