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Acanthastrea echinata

(Dana, 1846)

Colonies are encrusting to massive and are rarely over one metre across. Corallites are cerioid or subplocoid, circular and have thick walls. Septa have long pointed teeth. Colonies have thick fleshy tissue over the skeleton which usually forms concentric folds.

Colour: Uniform or mottled dull brown, grey or green, but sometimes brightly coloured.

Habitat: Most reef environments.

Abundance: Usually uncommon, but by far the most common Acanthastrea on tropical reefs.

Similar species: Acanthastrea brevis , Acanthastrea hemprichii , Acanthastrea subechinata , Favites abdita , Favites flexuosa

Taxonomic note: Source reference: Veron (2000). Taxonomic references: Chevalier (1975), Veron and Pichon (1980). Additional identification guides: Randall and Myers (1983), Veron (1986), Sheppard and Sheppard (1991), Nishihira and Veron (1995), Coles (1996), Carpenter et al. (1997).

Map displaying probable distribution of species. Points indicate recorded sightings from OBIS.
Acanthastrea echinata.  Tanzania.  Colonies are usually mound-shaped or flat.  Charlie Veron.

Acanthastrea echinata. Tanzania. Colonies are usually mound-shaped or flat. Charlie Veron.

Acanthastrea echinata.  Philippines.  Colonies have a wide range of colours and surface texture. Textural differences are primarily due to the thickness of the polyp flesh rather then the underlying skeletal structure.  Charlie Veron.

Acanthastrea echinata. Philippines. Colonies have a wide range of colours and surface texture. Textural differences are primarily due to the thickness of the polyp flesh rather then the underlying skeletal structure. Charlie Veron.

Acanthastrea echinata.  Ashmore Reef, western Australia.  Colonies have a wide range of colours and surface texture. Textural differences are primarily due to the thickness of the polyp flesh rather then the underlying skeletal structure.  Charlie Veron.

Acanthastrea echinata. Ashmore Reef, western Australia. Colonies have a wide range of colours and surface texture. Textural differences are primarily due to the thickness of the polyp flesh rather then the underlying skeletal structure. Charlie Veron.

Acanthastrea echinata.  Solitary Islands, south-eastern Australia.  Colonies have a wide range of colours and surface texture. Textural differences are primarily due to the thickness of the polyp flesh rather then the underlying skeletal structure.  Neville Coleman.

Acanthastrea echinata. Solitary Islands, south-eastern Australia. Colonies have a wide range of colours and surface texture. Textural differences are primarily due to the thickness of the polyp flesh rather then the underlying skeletal structure. Neville Coleman.

Acanthastrea echinata.  Guam.  Colonies have a wide range of colours and surface texture. Textural differences are primarily due to the thickness of the polyp flesh rather then the underlying skeletal structure.  Gustav Paulay.

Acanthastrea echinata. Guam. Colonies have a wide range of colours and surface texture. Textural differences are primarily due to the thickness of the polyp flesh rather then the underlying skeletal structure. Gustav Paulay.

Acanthastrea echinata.  Great Barrier Reef, Australia.  Colonies have a wide range of colours and surface texture. Textural differences are primarily due to the thickness of the polyp flesh rather then the underlying skeletal structure.  Valerie Taylor.

Acanthastrea echinata. Great Barrier Reef, Australia. Colonies have a wide range of colours and surface texture. Textural differences are primarily due to the thickness of the polyp flesh rather then the underlying skeletal structure. Valerie Taylor.

Acanthastrea echinata.  Great Barrier Reef, Australia.  Showing corallites.

Acanthastrea echinata. Great Barrier Reef, Australia. Showing corallites.

Acanthastrea echinata.  Great Barrier Reef, Australia.  Showing corallites.

Acanthastrea echinata. Great Barrier Reef, Australia. Showing corallites.

Acanthastrea echinata.  Great Barrier Reef, Australia.  Showing corallites.

Acanthastrea echinata. Great Barrier Reef, Australia. Showing corallites.

Acanthastrea echinata.  Great Barrier Reef, Australia.  Showing corallites.

Acanthastrea echinata. Great Barrier Reef, Australia. Showing corallites.

Acanthastrea echinata.  Southern Red Sea.  Showing corallites.

Acanthastrea echinata. Southern Red Sea. Showing corallites.