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Old 09-22-2004, 11:09 AM   #1
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Emerald Mithrax Crabs

I just ordered several inverts from eTropicals.com. 2 of them were Emerald Mithrax Crabs. When I pulled the bag out of the box, I see not 2 but 3 crabs in there. 1 is a beautiful shade of green, the other 2 are more "peach colored". I thought the name, "Emerald" meant green. Can they be other colors aside from green or did I get some other type of crab?

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75 gal SW tank, Eheim 2215 Filter, 45lb Figi Premium LR, 2 Maxi-Jet Powerhead/Pump Model 900

5 Dwarf Red Tip Hermit Crabs, 5 Dwarf Blue Leg Hermit Crabs, 3 Emerald Mithrax Crabs, 1 Cleaner Shrimp, 1 Fire Shrimp, 10 Cerith Snails, 10 Nassarius Snails, 6 Bumble Bee Snails, 16 Turbo Snails, 1 Brittle Sea Star

Yellow-tailed Blue Damsel, Foxface Lo, Coral Beauty Angelfish, Sailfin Tang, Scooter Blenny
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Old 09-22-2004, 06:52 PM   #2
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anyone have any advice?
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75 gal SW tank, Eheim 2215 Filter, 45lb Figi Premium LR, 2 Maxi-Jet Powerhead/Pump Model 900

5 Dwarf Red Tip Hermit Crabs, 5 Dwarf Blue Leg Hermit Crabs, 3 Emerald Mithrax Crabs, 1 Cleaner Shrimp, 1 Fire Shrimp, 10 Cerith Snails, 10 Nassarius Snails, 6 Bumble Bee Snails, 16 Turbo Snails, 1 Brittle Sea Star

Yellow-tailed Blue Damsel, Foxface Lo, Coral Beauty Angelfish, Sailfin Tang, Scooter Blenny
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Old 09-22-2004, 07:37 PM   #3
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They can be a different color
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Old 09-22-2004, 10:50 PM   #4
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They can be different colors for sure but I got a stupid rock crab in my order, ate a fish and at least 1 snail before I figured it out.
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Old 09-23-2004, 07:25 AM   #5
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The claws should have a little suction cup looking part on both sides that it uses to grab algae. I have dark red and green ones (dark green to a pale green).
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Old 09-23-2004, 07:26 PM   #6
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Mithrax crabs come in two different types from the caribean. Mithrax Sculptis, and Mithrax Rosaceous. A lot of people do not agree with me on this site, but I can show you the scientific data anaylsis we performed in Jamaica 4 years ago, that demonstrated that the Mithrax sculptis (the green kind), feeds primarily on algae and small inverts. The rosy ones (Mithrax rosaceous) tend to on the other hand have a lot of fish pieces in their stomach upon dissection. They should be ok when they are small, but as they age, they will get quite bad. I hope I can help.
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Old 09-28-2004, 09:40 PM   #7
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I've seen many different shades of Mithrax crabs, they can be from lime green to very dark brown with only a hint of green.

P.S They are good florida pompano/permit bait.
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