Emerald/Ruby Mithrax Crab*

Our crabs are guaranteed to eat bubble algae or we will refund the cost to you.

    Mithrax crabs have dull claws that allow them to scrape algae from your liverock and the lower portions of your glass, and are good at removing bubble algae, as well as other nuisance macroalgae like dictyota, caulerpa, and other complex macroalgae. The size of your bubble algae problem will largely determine the amount of emerald crabs that your tank will need to get the job done. In addition, they aer omnivores and will spend some time scavenging meals in your tank when they become available. 

     Emerald Crabs are somewhat territorial, and will spar at times with other emerald crabs if kept in too high of number for their available space. In general, you shouldn't have more than 1 Emerald Crab  per 18 pounds of rock in your aquarium.

This item requires Next Day Arrival to qualify for the Alive Arrival Guarantee. To see if Express Mail is next day to your area, you can click this link. Use the zip code 34994, and the shipping date you desire, not the current date.

This item requires Next Day Service.


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Orders placed today will ship Wednesday, April 22nd. Later dates available by request.

Use the code "5off" to receive $5 off any order over $40 placed today except rock orders.

By Default, our packages will ship "Deliver to Customer or Door". If you would like the signature requirement expressly waived, please let us know by leaving a note in the comments field, found immediately before the "Confirm Order" button during checkout. Always keep an eye out for the package on delivery day. You must be home to accept live packages. Packages are often left in mailboxes and around doors you may not frequently use. Please do not let it sit outside for hours or days if there are live animals inside. Abandonment and neglect will lead to losses, that we unfortunately do not cover because the risk is too high. Please be pro-active.

 Items marked with a * require Express Mail.