Horseshoe crab.

[Urban_s]

I picked up one last weekend. I used to have a cyno problem on my sand and my sand bed was not getting mixed up at all. This thing pushes sand around all day long. Watching them swim is just amusing. Just thought I would share. Anyone else have on of these?

[SpecailEd]

I had one awhile ago in fish only tank, he was in the sand all the time, but i found he kept getting stuck in places.

[Bruce]

I did have one a few years ago when my tank was still a baby. They are very fun to watch. Mine would get stuck once and a while...but as i added more and more rock it just got worse. One day i couldnt find him anymore and later that week i found him stuck and dead I think that these guys would be great for a large sandy tank...I relly want to put one in my old highschools shark tank.

[coral reefer]

I had often thought about getting one for my reef tank as I always found them very interesting, plus my kids like to pick them up and hold them. Not a good reef addition however, due to its eventual size and strength. Just what i need is something else to knock down my live rock and corals falling on top of each other!