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Euphyllia ancora

Veron and Pichon, 1980

Colonies may form a continuous cover over the substrate many metres across although individual colonies are seldom over one metre across. Colonies have the same skeletal structure as Euphyllia divisa. Polyps have large tubular tentacles with few or no branchlets but with anchor, hammer or T-shaped tips.

Colour: Blue-grey to orange, usually with pale cream or green outer borders to the tentacles.

Habitat: Large colonies are usually found in shallow environments exposed to moderate wave action.

Abundance: Seldom common, but may be a dominant species on protected horizontal substrates and on rocky outcrops in high latitude locations.

Similar species: Euphyllia paraancora

Taxonomic note: Source reference: Veron (2000). Taxonomic reference: Veron and Pichon (1980). Additional identification guides: Veron (1986), Nishihira and Veron (1995).

Map displaying probable distribution of species. Points indicate recorded sightings from OBIS.
Euphyllia ancora.  Indonesia.  A spectacular monospecific stand.  Gerry Allen.

Euphyllia ancora. Indonesia. A spectacular monospecific stand. Gerry Allen.

Euphyllia ancora.  Ryukyu Islands, Japan.  Colonies are usually cushion-shaped with masses of tentacles obscuring the underlying colony shape.  Charlie Veron.

Euphyllia ancora. Ryukyu Islands, Japan. Colonies are usually cushion-shaped with masses of tentacles obscuring the underlying colony shape. Charlie Veron.

Euphyllia ancora.  Philippines.  Colonies are usually various combinations of green and cream colours. Here two adjacent Colonies form a continuous mass of tentacles.  Charlie Veron.

Euphyllia ancora. Philippines. Colonies are usually various combinations of green and cream colours. Here two adjacent Colonies form a continuous mass of tentacles. Charlie Veron.

Euphyllia ancora.  Ryukyu Islands, Japan.  Variation in tentacle shape and colour. All these variations are common throughout the geographic range except 145-08 which is common only in Japan.  Charlie Veron.

Euphyllia ancora. Ryukyu Islands, Japan. Variation in tentacle shape and colour. All these variations are common throughout the geographic range except 145-08 which is common only in Japan. Charlie Veron.

Euphyllia ancora.  Ryukyu Islands, Japan.  Variation in tentacle shape and colour. All these variations are common throughout the geographic range except 145-08 which is common only in Japan.  Kazuhika Yanagiya.

Euphyllia ancora. Ryukyu Islands, Japan. Variation in tentacle shape and colour. All these variations are common throughout the geographic range except 145-08 which is common only in Japan. Kazuhika Yanagiya.

Euphyllia ancora.  Ryukyu Islands, Japan.  Adjacent colonies with different tentacle shapes.  Charlie Veron.

Euphyllia ancora. Ryukyu Islands, Japan. Adjacent colonies with different tentacle shapes. Charlie Veron.

Euphyllia ancora.  Philippines.  Variation in tentacle shape and colour. All these variations are common throughout the geographic range except 145-08 which is common only in Japan.  Charlie Veron.

Euphyllia ancora. Philippines. Variation in tentacle shape and colour. All these variations are common throughout the geographic range except 145-08 which is common only in Japan. Charlie Veron.

Euphyllia ancora.  Mainland Japan.  Variation in tentacle shape and colour. All these variations are common throughout the geographic range except 145-08 which is common only in Japan.  Charlie Veron.

Euphyllia ancora. Mainland Japan. Variation in tentacle shape and colour. All these variations are common throughout the geographic range except 145-08 which is common only in Japan. Charlie Veron.

Euphyllia ancora.  Great Barrier Reef, Australia.  Showing valleys.

Euphyllia ancora. Great Barrier Reef, Australia. Showing valleys.

Euphyllia ancora.  Great Barrier Reef, Australia.  Showing valley end.

Euphyllia ancora. Great Barrier Reef, Australia. Showing valley end.

Euphyllia ancora.  Great Barrier Reef, Australia.  Showing colony valleys.

Euphyllia ancora. Great Barrier Reef, Australia. Showing colony valleys.

Euphyllia ancora.  Great Barrier Reef, Australia.  Showing valleys.

Euphyllia ancora. Great Barrier Reef, Australia. Showing valleys.

Euphyllia ancora.  Great Barrier Reef, Australia.  Showing colony shape.

Euphyllia ancora. Great Barrier Reef, Australia. Showing colony shape.

Euphyllia ancora.  Great Barrier Reef, Australia.  Showing colony shape.

Euphyllia ancora. Great Barrier Reef, Australia. Showing colony shape.