Colorful Crab Species Discovered in The Philippines

By Meera Dolasia on April 29, 2012

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Last week, scientists from Germany's Senckenberg Museum of Zoology announced the discovery of four new species of freshwater crabs in the biologically diverse island province of Palawanin the Philippines. Confined to a small inland area within the lowland-forest ecosystems of the island, the tiny crustaceans feature bright purple or red shells and red-tipped claws.

Hendril Freitag, the head zoologist for the museum believes that since crabs can discriminate colors, the different hues could possibly signal their power - Red for the larger more dominant male and purple, for the smaller females and young adult males.

Regardless of color the carapaces or exoskeletons of all four species are strong and hard, protecting them against river rocks. This is important for their survival, given the unlike other freshwater crabs they do not migrate to the ocean or dry land, but spend their entire lives burrowed under boulders and roots in streams, feeding off dead plants, fruits and small animals. The crabs' exterior also appears swollen because of their large gill chamber that allows them to breath and stay longer on land. Their inability to be able to migrate to the ocean and survive in saltwater, makes the species highly susceptible to extinction, even if their environment changes slightly.

All four new species which have been categorized under the Insulamon Genus are quite tiny - The biggest, called Insulamon Magnum is 53 millimeters by 41.8 millimeters while the smallest, Insulamon Porculum, measures just 33.1 by 25.1 millimeters.

US-based Conservation International, lists the Philippines as one of 17 countries that harbor most of Earth's plant and animal life. Unfortunately, like these purple crabs, a lot of it is vulnerable because the forests are being cleared to make room for farming, mining and home building, effectively reducing if not completely destroying, the habitats of many species.


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  • snowfurw
    snowfurwWednesday, February 25, 2015 at 5:38 pm
    wow that is awesome!
    • cassidyhayesmcqueen
      cassidyhayesmcqueenSunday, February 8, 2015 at 8:23 am
      cool. I'd like to see one.
      • block buster t4Sunday, September 21, 2014 at 2:31 pm
        this kind of crab look like the chirtmas island land crab mmmm i think this kind more rare then the strawberry crab found in 2009
        • AndreahWednesday, September 17, 2014 at 1:30 pm
          My family lives there
          • JsWednesday, September 10, 2014 at 5:39 am
            • gurgle
              gurgleTuesday, July 29, 2014 at 1:51 pm
              Cool #awesome
              • ikyra_marie
                ikyra_marieSunday, March 16, 2014 at 10:54 am
                So pretty!I wish i could find one as pretty as that.Or find one at the beaches close to me
                • niomi
                  niomiThursday, March 6, 2014 at 11:02 am
                  the purple crab is cute
                  • headream100
                    headream100Monday, December 9, 2013 at 1:24 am
                    I saw colorful crabs on my trip to an antique cottage. It was right next to the ocean, and I stayed there for a week. I went to the shore and OMG ARE YOU KIDDING ME BLUE CRABS???????
                    • kimWednesday, November 13, 2013 at 7:34 am
                      cool dude

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