sea anemones text index | photo index
Phylum Cnidaria > Class Anthozoa > Subclass Zoantharia/Hexacorallia > Order Actiniaria
Neon anemone
Isactinia citrina
Family Actiniidae
updated Jul 2024
Where seen? This medium-sized anemone is sometimes wedged in crevices in coral rubble near living reefs on our Southern shores. Usually seen alone.

Features: Diameter 5-10cm with tentacles expanded. Many tentacles mostly on the edge of the oral disk. Tentacles short, slender, tapering; dark green or blue with red tips. Oral disk dark with radiating pale stripes. Body column thick short smooth pale usually with flourescent green stripes or blotches. A row of large bumps on the top of the body column.

Isactinia citrina can also look like Posy anemones.

Status and threats: As at 2024, it is assessed not to be approaching the criteria for being listed among the threatened animals in Singapore.

Terumbu Hantu, Apr 12

Terumbu Hantu, Apr 12

Raffles LIghthouse, May 04

*Species are difficult to positively identify without close examination.
On this website, they are grouped by external features for convenience of display.

Neon anemones on Singapore shores
On wildsingapore flickr

Other sightings on Singapore shores

Terumbu Semakau, Apr 24
Photo shared by Kelvin Yong on facebook.

Terumbu Semakau, Jun 12
Photo shared by James Koh on his blog.

Sisters Island, May 12

Photos shared by James Koh on his blog.


  • Checklist of Cnidaria (non-Sclerectinia) Species with their Category of Threat Status for Singapore by Yap Wei Liang Nicholas, Oh Ren Min, Iffah Iesa in G.W.H. Davidson, J.W.M. Gan, D. Huang, W.S. Hwang, S.K.Y. Lum, D.C.J. Yeo, 2024. The Singapore Red Data Book: Threatened plants and animals of Singapore. 3rd edition. National Parks Board. 258 pp.
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