Pocilloporidae
Colonial reef-building corals of the Pacific and Indian Oceans.
The Pocilloporidae are a family of stony corals found in the Pacific and Indian Oceans, belonging to the order Scleractinia. These corals are colonial, with most species contributing to reef-building. Their size and shape vary widely, from submassive forms to branching, tree-like (arborescent) or antler-like (ramose) structures. The small corallites can be either sunken or raised into cones. The columellae are well-developed, and the septa may fuse with them. The coenosteum, which lines the skeleton, is covered in tiny spinules. This family is closely related to the Astrocoeniidae and Acroporidae families.
In terms of biology, the genera within this family are polymorphic, meaning their growth form changes depending on habitat, particularly in response to light and wave action. The colonies are hermaphroditic. Sperm is released into the water and enters other polyps. After internal fertilization, the parent broods the planula larvae before releasing them into the water column. This results in short dispersal distances but increases the chance of finding suitable substrate for settlement.
The World Register of Marine Species lists the following genera: *Madracis*, *Pocillopora*, *Seriatopora*, and *Stylophora*.
Quick Facts
- Taxon
- Pocilloporidae
Facts from the source article.
Lore & Background
Pocilloporids are colonial stony corals that are mostly reef-building. They exhibit great variability in size and shape, with some colonies being submassive and others arborescent or ramose. The corallites are small and can be either sunken or raised cones. The columellae are well developed, and the septa may be fused with them. The coenosteum lining the skeleton is covered with spinules. The family is closely related to the Astrocoeniidae and Acroporidae.
The genera within Pocilloporidae are polymorphic, meaning their growth form differs according to habitat, but they show similar growth forms in response to light availability and wave action. Colonies are hermaphrodites. Sperm is liberated into the sea and finds its way into other polyps. After internal fertilisation, the planula larvae are brooded by the parent before being ejected into the water column. This results in small dispersal distances but increases the likelihood of finding suitable substrate on which to settle.
Reader's Guide
The significance of the Pocilloporidae lies in their role as reef-building corals in the Pacific and Indian Oceans. Their colonial nature and variable growth forms—submassive to arborescent or ramose—allow them to occupy diverse reef habitats. The family's close relationship to Astrocoeniidae and Acroporidae places it within a broader evolutionary context of stony corals. Their reproductive strategy, involving internal fertilisation and brooding of planula larvae, limits dispersal distances but enhances settlement success on suitable substrates. This trade-off influences their distribution and population dynamics. The polymorphism of genera, with growth forms shaped by light availability and wave action, demonstrates their adaptability to environmental conditions. The four recognized genera—Madracis, Pocillopora, Seriatopora, and Stylophora—represent the taxonomic breadth of the family as listed by the World Register of Marine Species.
Did You Know?
- Pocilloporidae occur in the Pacific and Indian Oceans.
- Most species in this family are reef-building.
Frequently Asked Questions
What is Pocilloporidae?
Pocilloporidae is a family of stony corals (order Scleractinia) made up of four genera—Pocillopora, Seriatopora, Stylophora, and Madracis—that form colonies of tiny polyps across tropical reefs. It is the group most people refer to when they talk about birdsnest or Pocillopora corals.
What do Pocilloporidae colonies look like?
Their growth forms span a wide range, from chunky submassive blocks to branching, tree-like, or antler-like (ramose) structures. The individual corallites are small and can sit sunken or pop up as little cones, while the skeleton's outer surface (coenosteum) is studded with fine spinules and the internal septa often fuse with well-developed columellae.
Where do Pocilloporidae corals live in the wild?
You'll find them throughout the Pacific and Indian Oceans, where most species actively contribute to building and maintaining hard-reef structures. They are a familiar sight on fringing reefs, barrier reefs, and lagoonal slopes across both ocean basins.
How is Pocilloporidae related to other coral families?
Within the order Scleractinia, Pocilloporidae is considered a close relative of both the Astrocoeniidae and the Acroporidae. This shared lineage helps explain some of the overlapping skeletal features, such as the well-developed columellae seen across these groups.
Why are Pocilloporidae important to reef ecosystems?
Most of their species are colonial reef-builders, meaning they lay down the calcium-carbonate framework that gives tropical reefs their three-dimensional structure. That structural role supports the enormous biodiversity of fish, invertebrates, and other organisms that depend on hard-reef habitat.
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