Have never been able to get a good shot of mine, aisle is too narrow, and light gets funny. I believe it's called Malawi Rocks, had it on and off my 150 gal for maybe 10 years with many different fish and incarnations.
Think its from a Swedish company, but can't remember the name.
Fish are able to get behind it and hide, considering getting a thinner one that fits tighter and prevents that.