Almost all utilize symbiotic photosynthesizing zooxanthella as a major energy source.

The tissues of this coral contain symbiotic unicellular algae called zooxanthella.

This has a rough surface and contains zooxanthella, symbiotic, unicellular, photosynthetic algae.

Gersemia rubiformis does not contain the symbiotic alga zooxanthella.

They mostly obtain at least part of their energy requirements from zooxanthella (Symbiodinium), symbiotic photosynthetic microalgae.

Effects of anemonefish on giant sea anemones: ammonium uptake, zooxanthella content and tissue regeneration.

In common with other corals that contain zooxanthella, Galaxea fascicularis is likely to be stressed by climate change and the warmer waters it may cause.

Ahermatypic corals have no zooxanthella (Symbiodinium).

Diploria labyrinthiformis hosts Zooxanthella, a symbiotic dinoflagellate alga.

Symbiodinium (Zooxanthella, a coral endosymbiont)

It appears that, in addition to symbiotic zooxanthella, this coral harbors endocellular symbiotic cyanobacteria, possibly to help it fix nitrogen.

Coral bleaching occurs when zooxanthellae densities within coral tissue become low or the concentration of photosynthetic pigments within each zooxanthella decline.

The coral has symbiotic dinoflagellate alga called zooxanthella in its tissues and it is these which give the coral its colour of yellowish or greenish brown, or occasionally blue-grey.

Although some corals can catch small fish and plankton, using stinging cells on their tentacles, like those in sea anemone and jellyfish, most corals obtain the majority of their energy and nutrients from photosynthetic unicellular algae that live within the coral's tissue called zooxanthella (also known as Symbiodinium).