HCA: Hermit Crab Association

I adopted a female jumbo about a year ago, since then she has killed and eaten all of my crabs. I'm not sure if this an act of aggression, or if this crab as psychological issues? Please help. This crab has been a nightmare

How big is your tank? How deep the sub? How many crabs killed? How many shells available? What do you feed for protein & how often?

I have even more questions... to get to the bottom of this agression issue, you need to fill out the emergency template so we can get a look at the conditions - it could be the crab... but could just as easily be the tank not meeting it's needs!

Copy n' paste with your answers:

http://hermitcrabassociation.com/phpBB/ ... 27&t=46102

Without knowing your tank conditions I would believe it's due to a food related problem... She's probably deficient in one major/minor food group and is using your other crabs to supplement into her diet.

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I agree- sounds like a deficiency in the diet. Emergency template would help.


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I have a twenty gallon long, the substrate 7'' deep, my in-tank temp is 75 degrees. All of my hermits have a complete diet of shrimp, veggies, fruits, nuts and other hermit-safe foods. With all this being said.. It seems like an act of aggression to me.. D:

A "true" jumbo crab needs at least a 75 gal tank with a min of 12 inches sub... This "aggression" as you say can be from a number of things: roaming room, molting room, overcrowding, lack of certain nutrients, etc... They also need a min temp of 80 and a min humidity of 80.

Like everyone else mentioned, filling out the template will help us determine whats going on.

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Filling out the template... in detail. The more information given thecclearee the picture you provide us and the better we can help you.

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Here is the template: http://hermitcrabassociation.com/phpBB/ ... 27&t=46102