Finger Coral Skeleton / Staghorn Coral Fragment
Phylum: Cnidaria, Class: Anthozoa, Order: Scleractinia, Family: Poritidae, Genus: Porites, Species: Porites porites · Poritidae (Pore corals) · Coral Skeleton (Note: Technically a cnidarian skeletal remain rather than a mollusk shell, but often collected alongside shells)
Species
Porites porites
Shell Type
Coral Skeleton (Note: Technically a cnidarian skeletal remain rather than a mollusk shell, but often collected alongside shells)
Family
Poritidae (Pore corals)
Size
Approximately 3 to 4 inches across, which is a typical fragment size found washed ashore.
Color & Pattern
Chalky white to off-white due to sun bleaching and the loss of living tissue. The surface is porous with a rough, textured finish.
Rarity
Commonly found washed ashore on Caribbean and tropical Atlantic beaches.
Habitat
Shallow tropical marine waters, coral reefs, and reef flats, typically in depths ranging from 1 to 20 meters.
Geographic Range
Caribbean Sea, Gulf of Mexico, and the tropical Western Atlantic Ocean.
Description
An intricate, calcified skeletal fragment featuring knobby, finger-like branches with a highly porous texture. The surface is covered in tiny calicle pores where the individual coral polyps once lived.
Key Features
Knobby, finger-like branching growth habit, pale chalky coloration, and a distinctly porous, honeycomb-like microscopic surface structure.
Collector Value
Low commercial value, frequently collected as a natural decorative item or educational specimen by beachcombers.
Condition Notes
Sun-bleached skeleton fragment, intact in structure with minor wear around the edges. Grade: Good.
Interesting Facts
Stony corals like Porites are colonial organisms composed of hundreds of thousands of individual polyps that secrete calcium carbonate to build massive reef structures.
Ecological Role
Reef-building corals provide vital habitat, shelter, and feeding grounds for thousands of marine species and protect coastlines from storm surges. Many species are protected and harvesting live coral is strictly illegal.
Similar Species
Staghorn Coral (Acropora cervicornis), which typically has smoother, longer, and sharper cylindrical branches.
Beach Finding Tips
Look along the high-tide line on tropical beaches in the Caribbean, particularly after storms or heavy wave action.