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Corkscrew Tentacle Sea Anemone MACRODACTYLA DOREENSIS
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Description:
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Original description As Actinia doreensis, from specimens collected at Port Dorey, New Guinea, now Manokwari, Irian Jaya, Indonesia
Diagnostic field characters Tentacles few, long (to 175 mm), all alike, sinuous, evenly tapered to point, sometimes (but not invariably) assuming corkscrew shape. Oral disc widely flared, to 500 mm diameter but commonly considerably less, with radial white lines that may extend onto tentacles; lies at surface of sediment. Column buried in sediment; lower part dull orange to brilliant red, upper part brownish with non-adhesive, prominent white round to ovoid (eye-shaped) verrucae in longitudinal rows.
Details Oral disc usually purplish-gray to brown, sometimes with a green cast; tentacles basically same colour but tips may be darker or lighter. When disturbed, tentacles may shrivel or may adhere to collector's hand and pull off. Often found in mud, generally no deeper than 5 m, commonly without fish; can retract completely into sediment.
Similar species Heteractis aurora, H. crispa, and H. malu also live burrowed into sediment, and may have red or yellow pigmentation on the lower column. Tentacles of M. doreensis lack bulges, in contrast to those of H. aurora, are fewer than those of H. crispa, and are longer than those of H. malu. The column of M. doreensis is thin, and has distinctive verrucae. The distribution of this species is the most restricted of any host anemone.
Distribution Japan south to New Guinea and northern Australia
Fish A. chrysogaster, A. clarkii, A. perideraion
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Keywords:
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Corkscrew Tentacle Sea Anemone
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Posts: 663
Registered: March 2001
Location: Abingdon,MD
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