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Fiddler Crab Uca annulipes male To be honest, I am not sure that these fiddler crabs I have seen in Lembeh Island are all U. annulipes but they are Uca genus. The reason is because within the species they vary their coloration and their claw can be located in the left or the right arm. Moreover, when they loose the claw they will develop a new one on the opposite arm. I have seen crabs with a yellow claw and others with a red claw. I tried to find out if the yellow is a second claw grown after loosing the first claw, presumably red? but I could not find a color explanation. The females do not have this massive claw and are otherwise also of variable colors but without the design/pattern the males have on the carapace.<br />
More on this here:<br />
<a href="https://en.wikipedia.org/wiki/Fiddler_crab" rel="nofollow">https://en.wikipedia.org/wiki/Fiddler_crab</a><br />
And here a video:<br />
<section class="video"><iframe width="448" height="282" src="https://www.youtube.com/embed/MwO6d5y8u-A?hd=1&autoplay=0&rel=0" frameborder="0" allowfullscreen></iframe></section> Geotagged,Indonesia,Spring,Uca annulipes Click/tap to enlarge Promoted

Fiddler Crab Uca annulipes male

To be honest, I am not sure that these fiddler crabs I have seen in Lembeh Island are all U. annulipes but they are Uca genus. The reason is because within the species they vary their coloration and their claw can be located in the left or the right arm. Moreover, when they loose the claw they will develop a new one on the opposite arm. I have seen crabs with a yellow claw and others with a red claw. I tried to find out if the yellow is a second claw grown after loosing the first claw, presumably red? but I could not find a color explanation. The females do not have this massive claw and are otherwise also of variable colors but without the design/pattern the males have on the carapace.
More on this here:
https://en.wikipedia.org/wiki/Fiddler_crab
And here a video:

    comments (2)

  1. Wow, they're even synchronizing their punches :) Posted 5 months ago
  2. So interesting, Marta! Posted 5 months ago

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''Uca annulipes'' is a species of fiddler crab found along the coastline from South Africa to Somalia, Madagascar, India, China, Indonesia, Malaysia and the Philippines.

Similar species: Ten-footed Crustaceans
Species identified by Patomarazul
View Patomarazul's profile

By Patomarazul

All rights reserved
Uploaded Oct 26, 2019. Captured May 27, 2018 03:18 in Paudean, South Lembeh, Bitung City, North Sulawesi, Indonesia.
  • SP-820UZ
  • f/5.7
  • 1/320s
  • ISO250
  • 127.4mm