Mangrove
jellyfish
Acromitus sp.
Family Catosylidae
updated
Sep 2025
Where
seen? This energetic little jellyfish is sometimes seen in large numbers near mangrove,
e.g., at the mouth of mangrove streams, and in estuarine seagrass
meadows on our Northern shores.
Features: Bell about 6-8cm in diameter. Each fat sausage-like oral arm has a
long 'tail'. Moves in short bobs as it energetically contracts its
small bell.
Status: It is listed as Vulnerable at 2024 in the Singapore Red Data Book. |
Sungei Buloh
Wetland Reserve, Feb 09
Photo shared by Brandon
Chia
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Pulau Ubin, Apr 09
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Chek Jawa, Apr 08
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Mangrove
jellyfishes on Singapore shores |
Other sightings on Singapore shores |
Chek Jawa, Dec 12
Photo shared by Loh Kok Sheng on flickr. |
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Acknowlegement
With grateful thanks to Dr
Michael N Dawson of the University of California, Merced for identifying
this jellyfish.
Links
- 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, May 2024. The Singapore Red Data Book: Threatened plants and animals of Singapore. 3rd edition. National Parks Board. 663 pp
- Uwe Will & Iffah Iesa. River jellyfish, Acromitus hardenbergi, at Sungei Buloh. 30 November 2017. Singapore Biodiversity Records 2017: 156-157 ISSN 2345-7597. National University of Singapore.
- The
Scyphozoan website by Dr Michael N Dawson: lots of info about
jellyfishes in Class Scyphozoa.
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