Reeftalk Reviews - HETERACTIS AURORA

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Home » Marine Idenfication Database » Invertibrates » Anemonies

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Beaded Sea Anemone HETERACTIS AURORA

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Description:

Original description As Actinia aurora, from specimens collected in New Ireland

Diagnostic field characters Tentacles to 50 mm long, with swellings (up to 20 on long tentacles) at intervals, either on only one side or nearly surrounding a tentacle so that it resembles a string of beads. Swellings often white. Oral disc broad, to 250 mm or possibly more, spread flat or slightly undulating at surface of sediment.

Details Tentacles brown or purplish, arising from oral disc of the same colour; outermost tentacles may be shorter than inner, and can have purplish or greenish cast. Oral disc mostly visible because of sparse tentacles; may have white or brown radial markings that can continue onto tentacles. Tentacles may be sticky to touch; tapered to point that may be magenta in colour. Adhesive verrucae on upper column lighter in colour than column; lower column often mottled or solid orange or red. Animals attached to buried objects capable of retracting completely into sediment.

Similar species Macrodactyla doreensis, Heteractis malu, and H. crispa also live burrowed into sediment. Tentacles of the other two species of Heteractis may also be magenta-tipped, but those of H. aurora are unique in having swellings at intervals. Tentacles of H. aurora are intermediate in length between those of H. malu (shorter) and H. crispa and M. doreensis (longer). Tentacles in some individuals of H. aurora nearly as sparse as those of H. malu. The column of H. aurora is similar in texture to that of H. malu.

Distribution Micronesia and Melanesia to East Africa and the Red Sea, and Australia to the Ryukyu Islands

Fish A. akindynos, A. allardi, A. bicinctus, A. chrysogaster, A. chrysopterus, A. clarkii, A. tricinctus

Keywords:

Beaded Sea Anemone