Characters: Colonies may form large patches of reefs. Branches are cylindrical and commonly fuse. Growth-forms and corallite characters are extremely variable so much so that single reef patches are composites of distinct races.
Colour: Mostly dull greys and browns.
Similar species: Porites cylindrica and P. harrisoni, which have a similar appearance underwater.
Habitat: Shallow protected reef and lagoon environments.
Abundance: The dominant coral in Kaneohe Bay, Hawaii.
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