Yes, and I have one of those in one of my acro colonies, but this guy is slightly green and furry with no black stripe and black tipped claws.
Like this one:
http://www.google.com/imgres?q=acro+crab&hl=en&safe=off&client=safari&sa=X&rls=en&biw=1182&bih=734&tbm=isch&prmd=imvns&tbnid=8uqgFIL5Ddvc3M:&imgrefurl=http://home.wavecable.com/~jrowe/pests.htm&docid=SJKsZQOVEpf09M&imgurl=http://home.wavecable.com/~jrowe/acro%252520crab.jpg&w=561&h=414&ei=jNnrToHxDqm42wWrgs2lDw&zoom=1