Photographer John Turnbull describes this beautiful photo of snowy Carijoa octocoral (shot in the waters at Bare Island, Australia) as a "successful symbiosis." He writes:
The orange stem of carijoa is actually a coating of encrusting sponge which lives in a symbiotic relationship with the coral. It is thought that the toxic sponge protects the coral's stem from predators, and in return the coral provides a home for the sponge. This is a very successful relationship.
In other words: Sponge and coral, BFFs.
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