mmslue79- I love my horseshoe crab. I have only had it for six months but it is hilarious to watch swim/stumble around the tank. If you have sensitive corals it can pose a problem due to the fact that the little guy plows into them every great once in a while. They get pretty large so I may have to get rid of him in a year or two. Not sure how quickly they grow.
My little horseshoe is scampering about right as we speak. His nose must have itched.