Insulamon palawanense

Insulamon palawanense, or the Palawan purple crab is a species of freshwater crab from the Philippines described in 2012. They are 2.5 - 5.3 cm wide and are a striking purple colour.

History
The species was described by Hendrik Freitag of the Senckenberg Museum of Zoology in Dresden, Germany, having previously been included in a wider circumscription of I. unicorn. The species is endemic to the island of Palawan, where it has a wide distribution. The striking iridescent purple coloration may help the crabs to recognise others of its species, or may serve no purpose.