Aquatic macroinvertebrates of Nee Soon 
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Map data 2017 Google 
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Decapoda 
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Fig. 13. Distribution and abundance of order Decapoda in the Nee Soon drainage. Solid 
circles indicate sites where representatives were collected and circle sizes are proportionate to 
abundance/numbers of individuals captured as reflected in the accompanying legend. 
Order Decapoda 
The decapods are so named due to the ten walking legs all members of this group 
possess. The crustaceans which most people are familiar with, such as crayfish, crabs, 
and shrimp, belong to this group. In the Nee Soon drainage, three groups of decapods 
- Atyidae, Palaemonidae (families of shrimp) and Brachyura (infraorder for crabs, 
in two families, Gecarcinucidae and Sesarmidae) can be found. The decapods are 
distributed throughout the entire drainage and are relatively common and abundant, 
being found in greatest numbers in the northeast and southwest areas of the Nee Soon 
