Cauliflower Coral (also known as Rose Coral or Brush Coral)
Phylum: Cnidaria, Class: Anthozoa, Order: Scleractinia, Family: Pocilloporidae, Genus: Pocillopora, Species: P. damicornis · Pocilloporidae (Small-polyp stony corals) · None (Scleractinian/Stony Coral Skeleton). This is a colonial calcium carbonate structure, not a mollusk shell. Shape is branching/cauliform.
Species
Pocillopora damicornis
Shell Type
None (Scleractinian/Stony Coral Skeleton). This is a colonial calcium carbonate structure, not a mollusk shell. Shape is branching/cauliform.
Family
Pocilloporidae (Small-polyp stony corals)
Size
Approximately 4-6 inches in diameter. This represents a compact colonial head; the species can grow into much larger clusters in the wild.
Color & Pattern
Uniformly bleached white. Living specimens are typically brownish, greenish, or pinkish due to zooxanthellae. This specimen has been cleaned of all organic tissue, leaving the crystalline aragonite skeleton.
Rarity
Common. It is one of the most widespread and resilient stony corals, though finding large, intact, naturally sun-bleached pieces on beaches is less common than finding small fragments.
Habitat
Shallow water tropical reefs, typically in high-energy zones like reef flats or slopes. It is a marine species found from 0 to 40 meters deep.
Geographic Range
Widely distributed throughout the Indo-Pacific, from East Africa and the Red Sea to the west coast of Central America.
Description
A stunning, intricate calcium carbonate skeleton featuring a 'cauliflower' or 'broccoli' appearance. The structure is composed of short, stout branches that terminate in tiny, wart-like protrusions called verrucae. The entire surface is covered in microscopic pores where individual polyps once lived.
Key Features
Branching structure with rounded, blunt tips; dense surface covered in small bumps (verrucae); lack of central 'eye' or large calices found in Acropora species.
Collector Value
Low to Moderate. While beautiful for home decor, common Indo-Pacific corals are heavily regulated. Its value is mainly decorative rather than scientific unless accompanied by specific locality data.
Condition Notes
The specimen appears mostly intact but shows signs of being an 'old' find, evidenced by the dust/lint trapped in the branches. It is fully bleached with no remaining periostracum-like organic matter. Individual branch tips look slightly worn. Condition: Good (Decorative).
Interesting Facts
Unlike most corals that release eggs/sperm, this species can 'brood' larvae and release them ready to settle. It is often the first coral to colonize new or damaged reefs due to its hardy nature.
Ecological Role
A major reef-builder that provides complex 3D habitat for small fish and invertebrates. It is currently listed as 'Least Concern' but is threatened by ocean acidification and coral bleaching.
Similar Species
Pocillopora verrucosa (Grainy Cauliflower Coral) which has more widely spaced and larger verrucae, or various Acropora species which have distinct tube-like corallites.
Beach Finding Tips
Look in 'wrack lines' after major storms in tropical regions. Because they are lightweight when dead, they often float or tumble onto the sand during high surges.