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Porites nigrescens

Dana, 1846

Colonies are branching, sometimes with an encrusting base. Concave calices give the surface a pitted appearance. Tentacles are frequently extended during the day.

Colour: Brown or cream.

Habitat: Common on lower reef slopes and lagoons protected from wave action.

Abundance: Sometimes common.

Similar species: Porites negrosensis , Porites rugosa

Taxonomic note: Taxonomic note: This species is divisible into several smaller semi-distinct taxonomic units. Source reference: Veron (2000). Taxonomic reference: Veron and Pichon (1982). Additional identification guides: Veron (1986), Nishihira and Veron (1995).

Map displaying probable distribution of species. Points indicate recorded sightings from OBIS.
Porites nigrescens.  Philippines.  With P. cylindrica (centre, mustard colour) and and P. attenuata (top and centre right).  Charlie Veron.

Porites nigrescens.Philippines.With P. cylindrica (centre, mustard colour) and and P. attenuata (top and centre right).Charlie Veron.

Porites nigrescens.  Philippines.  A large colony.  Charlie Veron.

Porites nigrescens.Philippines.A large colony.Charlie Veron.

Porites nigrescens.  Ryukyu Islands, Japan.  Common appearance of a small colony in shallow water.  Charlie Veron.

Porites nigrescens.Ryukyu Islands, Japan.Common appearance of a small colony in shallow water.Charlie Veron.

Porites nigrescens.  Ashmore Reef, western Australia.  Branch detail.  Charlie Veron.

Porites nigrescens.Ashmore Reef, western Australia.Branch detail.Charlie Veron.

Porites nigrescens.  Vietnam.  With P. cylindrica (left).  Charlie Veron.

Porites nigrescens.Vietnam.With P. cylindrica (left).Charlie Veron.

Porites nigrescens. Diagram showing corallite characters.   .

Porites nigrescens.Diagram showing corallite characters. .

Porites nigrescens.  Ryukyu Islands, Japan.  Showing branching pattern.

Porites nigrescens.Ryukyu Islands, Japan.Showing branching pattern.

Porites nigrescens.  Great Barrier Reef, Australia.  Showing corallites.

Porites nigrescens.Great Barrier Reef, Australia.Showing corallites.

Porites nigrescens.  Great Barrier Reef, Australia.  Showing branching pattern.

Porites nigrescens.Great Barrier Reef, Australia.Showing branching pattern.

Porites nigrescens.  Great Barrier Reef, Australia.  Showing branching pattern.

Porites nigrescens.Great Barrier Reef, Australia.Showing branching pattern.

Porites nigrescens.  Great Barrier Reef, Australia.  Showing skeletal detail.

Porites nigrescens.Great Barrier Reef, Australia.Showing skeletal detail.

Porites nigrescens.  Great Barrier Reef, Australia.  Showing corallite detail.

Porites nigrescens.Great Barrier Reef, Australia.Showing corallite detail.