Nanhaipotamon

These crabs are relatively large, with a carapace breadth of up to . Depending on the species, the carapace may be vividly coloured, especially in males of N. hongkongense (orange to red),'' N. aculatum (dark blue) and N. zhuhaiense (light blue). Chelipeds are usually unequal, more so in larger males, where one cheliped is relatively much larger than the other. This may be of use in territorial fights, as the crabs are very aggressive towards conspecifics.'' == Distribution and habitat ==

Crabs of the genus Nanhaipotamon inhabit the banks of small to medium-sized hill streams, paddy fields and swamps. Macau, Guangdong, Fujian, Zhejiang, Taiwan and Dongyin Island. == Conservation ==

Although crabs of the genus Nanhaipotamon are subject to the pet trade, and many are only known from their respective type locality. Of the 18 currently accepted species, only three have meaningful IUCN assessments, the rest all being data deficient. Nearly a third of known species were described in the last ten years, and yet there is evidence that a lot more may be discovered in the near future. The gambling hub of Macau is one of the most densely populated places in the world, and a new species has been described there as recently as 2018.'' The rapid urbanization of coastal regions, habitat destruction, impacts on water quality and collection for consumption and the pet trade, pose serious threats to most known species. == Health ==

Nanhaipotamon fujianense is known to be an intermediate host for the lung fluke species Paragonimus skrjabini. == Species ==

• Nanhaipotamon aculatum Dai, 1997 • Nanhaipotamon dongyinense Shih, Chen & Wang, 2005 • Nanhaipotamon guangdongense Dai, 1997'' • Nanhaipotamon pingyuanense Dai, 1997'' • Nanhaipotamon yongchuense Dai, 1997'' == Gallery ==

File:Nanhaipotamon hongkongense island.jpg|alt=N. hongkongense from Hong Kong Island|Nanhaipotamon hongkongense File:Nanhaipotamon hongkongense.jpg|alt=N. hongkongense hidden in crevice|Nanhaipotamon hongkongense File:Nanhaipotamon aculatum 1.jpg|alt=N. aculatum hiding in its burrow|Nanhaipotamon aculatum File:Nanhaipotamon aculatum 2.jpg|alt=N. aculatum hiding in burrow|Nanhaipotamon aculatum File:Nanhaipotamon guangdongense.jpg|alt=Nanhaipotamon guangdongense from Zhuhai|Nanhaipotamon guangdongense == References ==