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Favia fragum

(Esper, 1797)

Colonies are small (usually less than 50 mm across) and hemispherical to encrusting. Corallites have very variable shapes ranging from immersed to conical (plocoid) to tubular (subphaceloid) and may be circular with one mouth, to elongate with many mouths. Encrusting colonies in intertidal habitats may be submeandroid. Spherical colonies with unrestricted growing space commonly develop tubular corallites. Corallites or valleys are seldom more than 5 millimetres across. Whatever the corallite shape, the walls are neatly rounded. Septo-costae are exsert and evenly spaced.

Colour: Usually tan to light orange-brown with pale green tentacles. Walls and calices may have contrasting colours.

Habitat: Intertidal rock pools and shallow reef environments.

Abundance: Common.

Similar species:

Taxonomic note: Taxonomic note: This species is usually called Favia gravida in Brazil after Laborel (1969). Brazilian colonies are usually more meandroid but all characters overlap. Source reference: Veron (2000). Taxonomic references: Roos (1971), Zlatarski and Estalella (1982). Additional identification guides: Colin (1978), Humann (1993).

Map displaying probable distribution of species. Points indicate recorded sightings from OBIS.
Favia fragum.  Brazil.  Two colonies left with other Brazilian corals having small corallites. Stephanocoenia michelini (top right) and Sideratstrea stellata ( bottom right). Note the variation of corallite shape from circular to submeandroid.  Charlie Veron.

Favia fragum.Brazil.Two colonies left with other Brazilian corals having small corallites. Stephanocoenia michelini (top right) and Sideratstrea stellata ( bottom right). Note the variation of corallite shape from circular to submeandroid.Charlie Veron.

Favia fragum.  Brazil.  In intertidal habitats this species develops submeandriod corallites.  Charlie Veron.

Favia fragum.Brazil.In intertidal habitats this species develops submeandriod corallites.Charlie Veron.

Favia fragum.  Brazil.  Variation in corallite shape and colour.  Charlie Veron.

Favia fragum.Brazil.Variation in corallite shape and colour.Charlie Veron.

Favia fragum.  Caribbean.  Variation in corallite shape and colour.  Charlie Veron.

Favia fragum.Caribbean.Variation in corallite shape and colour.Charlie Veron.

Favia fragum.  South-eastern USA.  Corallites are sometimes protuberant and can be almost phaceloid.  Julian Sprung.

Favia fragum.South-eastern USA.Corallites are sometimes protuberant and can be almost phaceloid.Julian Sprung.

Favia fragum.  Brazil.  Showing whole colony.

Favia fragum.Brazil.Showing whole colony.

Favia fragum.  Brazil.  Showing corallites.

Favia fragum.Brazil.Showing corallites.

Favia fragum.  Caribbean.  Showing whole colony.

Favia fragum.Caribbean.Showing whole colony.

Favia fragum.  Caribbean.  Showing corallites.

Favia fragum.Caribbean.Showing corallites.

Favia fragum.  South-eastern USA.  Showing colony deformed by environmental  conditions.

Favia fragum.South-eastern USA.Showing colony deformed by environmental conditions.