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Scalar irradiance microsensor measurements performed inside the tissue of living corals show that absorption and fluorescence emission by host pigments produce dramatic spectral alterations in the light environment experienced by the symbionts.

Proton channels are present in reef-building corals and constitute important molecular players that should help understand calcification and the response of these organisms to ocean acidification.

Coral symbiotic alga is capable of degrading the own cell wall components by cellulase-related enzymes and releasing sugars as a simple and autonomous environmental response, even when the host-derived signals are not present.

Diversification of a conserved cholesterol binder drives functional replacement of cholesterol with symbiont-produced sterols in corals living in nutrient-poor environments.

The colonization of corals and their relatives by intracellular microalgae is facilitated by immunity proteins in the animal that contain thrombospondin-type-1 repeats, elucidating the inter-partner recognition processes required for the establishment of this ecologically important symbiosis.

Algae living inside corals provide sugars for their host by digesting their own cell walls.

Bacteria produce a syringe-like structure, loaded with a single protein within the lumen of its needle-like tube, that is sufficient for stimulating animal metamorphosis.

The symbiotic relationship between Hydra and Chlorella is driven by metabolic co-dependence and characterized by changes in the photobiont genome in terms of lack of genes essential in free-living algae.