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Symphyllia hassi

Pillai and Scheer, 1976

Colonies are hemispherical to flat and are seldom more than 0.2 metres across. Valleys are short and usually less than 25 millimetres wide. Walls are thick and in extreme cases can have an ambulacral groove which is wider than the valleys (similar to the faviid Diploria labyrinthiformis). Costae and septa are both thick. Septa have large blunt spines. Columellae are large and centred in valleys.

Colour: Cream.

Habitat: Exposed upper reef slopes and reef flats.

Abundance: Uncommon.

Similar species: Symphyllia agaricia

Taxonomic note: Source reference: Veron (2000). Taxonomic reference: Pillai and Scheer (1976).

Map displaying probable distribution of species. Points indicate recorded sightings from OBIS.
Symphyllia hassi.  Philippines.  Colonies are seldom larger then this. Walls are thick with prominent costae.  Doug Fenner.

Symphyllia hassi.Philippines.Colonies are seldom larger then this. Walls are thick with prominent costae.Doug Fenner.

Symphyllia hassi.  Philippines.  Showing costae.

Symphyllia hassi.Philippines.Showing costae.

Symphyllia hassi.  Philippines.  Showing whole colony.

Symphyllia hassi.Philippines.Showing whole colony.

Symphyllia hassi.  Philippines.  Showing valleys.

Symphyllia hassi.Philippines.Showing valleys.