New Reef Hitchhiker Discovery

Regardless of it's current size, it bears the markers of a destructive crustacean. It could be the best, mild mannered, Mr. Bean of crabs, but it is still a crab, and the size of the claws in ratio to the size of the body, the black and sharply angled tips, and the body structure tell me that you do not want this getting bigger in your display tank.

At the end of the day, it's your tank, and your call.
 
This is only 1.5cm in size...
1.5cm for now...it won’t be for long. The dip in high salinity water will get it out if you can figure out his rock. You could keep it in the sump if you have one. Would be cool to watch it grow. You will be surprised how big it gets!! If not, there’s a fish store by me who takes all these monster crabs to feed their large predators.
 

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WHICH TYPE OF MISTAKE TAUGHT YOU YOUR MOST EXPENSIVE REEFKEEPING LESSON?

  • Moving too quickly or adding too much at once

    Votes: 12 34.3%
  • Skipping—or shortening—quarantine or dipping

    Votes: 5 14.3%
  • Buying the wrong equipment the first time

    Votes: 5 14.3%
  • Ignoring maintenance, warning signs, or redundancy

    Votes: 11 31.4%
  • Chasing numbers or making too many changes

    Votes: 3 8.6%
  • Choosing incompatible fish, corals, or invertebrates

    Votes: 5 14.3%
  • Poor aquascaping or tank-design decisions

    Votes: 3 8.6%
  • Failing to research an animal’s needs

    Votes: 1 2.9%
  • Trusting bad advice

    Votes: 4 11.4%
  • Doing something on the tank when you should've gone to bed

    Votes: 5 14.3%
  • Something else—tell us below

    Votes: 4 11.4%
  • I’m still waiting for my first expensive lesson!

    Votes: 3 8.6%
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