For: Algae on rocks & scavenging
This is a Mithrax Crab and it's the only CRAB I sell for a reef tank! Completely reef safe. Great scavengers. Known to eat hair & sometimes bubble algae but will go after uneaten fish food & fish waste making them a great all-around cleaner!
Note that they will shed their entire body & leg shell when they need to grow. They literally open the bottom of their "belly pan" shell & back out! The shell left behind makes you think your Emerald crab is dead!! You can always take the shell out & if the bottom of the body shell flops down you know it's just a shed shell. :c) They may hide a bit more after shedding as their new shell hardens.
Recommended per tank:
1 /3 Ft - 2 /4 Ft - 3+ /6 Ft
Average size is 1/2 inch body shell.
Pictures are examples only. Expect some variations.