Ruby Red Mithrax Crab (Mithrax sculptus)
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Ruby Red Mithrax Crab (Mithrax sculptus)
Ruby Red Mithrax Crab (Mithrax sculptus)

Ruby Red Mithrax Crab (Mithrax sculptus)

Reviewed 8 time(s)
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Manufacturer: Crabs
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Ruby Red Mithrax Crab (Mithrax sculptus) The Saltwater Ruby Red Mithrax Crab is very similar to the Saltwater Emerald Crab in exception of it being ruby red. It basically has the same diet and will eat most types of algae. They are also very reef safe and a joy to watch in the home aquarium.
COMMON NAME: Ruby Red Mithrax crab
SCIENTIFIC NAME: Mithrax sculptus
MINIMUM TANK SIZE: 1 per 25 gallons
FOOD/DIET: Omnivore
CARE LEVEL: Moderately easy
AVAILABILITY: Most always available - 99%

  • Easy to care for and considered reef safe.
  • Recommended stocking is 1 per 25 gallons.
  • Also know as the Red Emerald Crab, it is very similar to to the Emerald Crab in most ways.
Customer Reviews
patricia channell of Georgia
Ruby mithrax
Awesome crabs I ordered two of them and they are doing great! Love them.
inurmind of San Diego
Ruby Crab
I've ordered a few of these guys over the years. Great crabs, very similar to emerald crabs- just now as common...Love having something a little less ordinary in the tank.
Brian of Texas
Red Mithraculus Crabs
I bought two. They are active, not shy, and survived a very high ammonia spike.
Mari of Cincinnati OH
Ruby Red Mithrax Crab
Ordered some for my 90 Gallon Tank, I didn't think about the shipping or the weather here. I did the 2 day shipping, to have delivered on a Friday. Yea right, Winter Weather Advisory issued for Friday. Crabs arrived alive and well. Great Packaging and neat little crabs
Jerry Hammond Jr of Lewes , DE
Ruby Red
Great crab, got him good sized and active. A day to get used to the tank and now it's all over the place! Not shy at all.
Matthew of Rome, Georgia
I just recieved one of these guys a few weeks ago and he was huge and had a beautiful red color to him. Now he has been getting to work, working on my hair algae.
Engloid of Knoxville, TN
Ruby Red Mithrax Crab
I have one of these that came with my aquarium when I bought it. It is nocturnal. In fact, I have NEVER seen it while the lights are on in the tank. It doesn't seem to be a bother to anything at all.
Melissa King of Ventura, CA
Ruby Red Crab
These Ruby Red "mithrax" crabs are the BEST for removing unwanted hair algae. They pretty much keep to themselves, and are fun to watch!