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Phylum Arthropoda > Subphylum Crustacea > Class Malacostraca > Order Decapoda > prawns and shrimps > Family Paleomonidae
Commensal shrimps
Periclimenes sp.*
Family Palaemonidae

updated Oct 2016

if you learn only 3 things about them ...
They live on other animals such as sea anemones and hard corals.
They are often found in pairs.
They are an excellent example of commensalism.

Where seen? These transparent shrimps are often seen living on other animals such as sea anemones, sea cucumbers, and hard and soft corals. Some are also seen in small groups on the ground and among seaweeds. These shrimps are hard to spot as they are small and transparent; and usually only active at night and when their host is submerged.

Features: 1-3cm long. These little shrimps are usually transparent. They are thus sometimes also called glass shrimps. Sometimes, all that can be seen of them are their beady little eyes! At night, the shine from their eyes make them easy to spot. Some have white markings or a fine stripe along the body.

Human uses: Unfortunately, these amazing shrimps are popular in the live aquarium trade and thus harvested from wild reefs to supply the trade.

Status and threats: Some of our commensal shrimps are listed as 'Vulnerable' on the Red List of threatened animals of Singapore. Llike other creatures of the intertidal zone, they are affected by human activities such as reclamation and pollution. Trampling by careless visitors and over-collection by hobbyists also have an impact on local populations.

Five-spot anemone shrimp
seen on carpet anemones in pairs.
Kusu Island, Jul 04


Tiny carpet anemone shrimp
seen on carpet anemones in groups of 5-10.
Pulau Sekudus, Jun 05


Little red-nose shrimps are also found on
living hard and soft corals.
St. John's Island, May 06

About 1cm, several seen on
a Thorny sea cucumber.
Beting Bronok, Aug 05

About 1cm, a pair seen on
a Flowery sea pen.
Changi, May 05

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

Genus Periclimenes recorded for Singapore
from Wee Y.C. and Peter K. L. Ng. 1994. A First Look at Biodiversity in Singapore.
in red are those listed among the threatened animals of Singapore from Davison, G.W. H. and P. K. L. Ng and Ho Hua Chew, 2008. The Singapore Red Data Book: Threatened plants and animals of Singapore
^from WORMS
+Other additions (Singapore Biodiversity Record, etc)

  Commensal shrimps commonly seen awaiting identification
Species are difficult to positively identify without close examination.
On this website, they are grouped by external features for convenience of display.
  Carpet anemone shrimp
Red nose shrimps

  Family Palaemonidae
  Periclimenes aesopius=^Ancylomenes aesopius
Periclimenes amymone=^Cuapetes amymone
Periclimenes brevicarpalis
(Five-spot anemone shrimp)
Periclimenes brooki
Periclimenes calmani=^Cuapetes calmani
*Periclimenes cristimanus
(Black urchin shrimp) (VU: Vulnerable)
Periclimenes elegans=^Cuapetes elegans
Periclimenes grandis=^Cuapetes grandis

*Periclimenes johnsoni=^Cuapetes johnsoni (Seagrass shrimp) (VU: Vulnerable)
Periclimenes lutescens=^Harpilius lutescens
Periclimenes parvus
Periclimenes sechellensis
Periclimenes spiniferus=^Periclimenella spinifera
Periclimenes suvaensis

Links

References

  • Chou, L. M., 1998. A Guide to the Coral Reef Life of Singapore. Singapore Science Centre. 128 pages.
  • Lim, S., P. Ng, L. Tan, & W. Y. Chin, 1994. Rhythm of the Sea: The Life and Times of Labrador Beach. Division of Biology, School of Science, Nanyang Technological University & Department of Zoology, the National University of Singapore. 160 pp.
  • Wee Y.C. and Peter K. L. Ng. 1994. A First Look at Biodiversity in Singapore. National Council on the Environment. 163pp.
  • Davison, G.W. H. and P. K. L. Ng and Ho Hua Chew, 2008. The Singapore Red Data Book: Threatened plants and animals of Singapore. Nature Society (Singapore). 285 pp.
  • Debelius, Helmut, 2001. Crustacea Guide of the World: Atlantic Ocean, Indian Ocean, Pacific Ocean IKAN-Unterwasserachiv, Frankfurt. 321 pp.
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