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Pom Pom or Boxer Crab Egg sac


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#1 Karen Honeycutt

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Posted 16 December 2013 - 08:05 PM

I presume the object under the crab is an egg sac, but all the examples I found on the web (admittedly all were from aquariums - I could find none from nature) were red in color.  Can anyone help?

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  • Lybia tesselata (Mosaic Boxer Crab) - Bali, Indonesia 2.jpg


#2 Alex_Mustard

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Posted 17 December 2013 - 12:40 AM

Yes, this is a parasite egg mass. The parasite infects the crab (often a barnacle parasite) and then changes the crab to a female (if it is not already) and makes the crab do its nefarious bidding - produce more parasite eggs.

 

The crabs are otherwise health - which of course is in the parasites interest too.

 

Alex


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#3 Karen Honeycutt

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Posted 01 November 2014 - 07:44 PM

Dear Alex (excuse the informality from a stranger!),

I had a hopeless time with the Wetpixel password and gave up trying for almost a year, so I just now got your response from last December.  Many, many thanks.  This is certainly something I would not have guessed in a million years and no one else knew either.

As I already told you in a prior email years ago answering a question about close up wide angle photography, I LOVE YOUR MARVELOUS IMAGES. 

Karen