I've never kept spotted, but I have kept the golden garden eel. I had a really tall cube tank with 6 inches of sand for my jawfish. I happened to see some garden eels while diving a wreck so I tried and got lucky collecting one ( I actually caught 2 but the first one I got out of the sand was snatched by a barracuda that was my dive partner on that particular dive). It did really well, eating everything and becoming less shy after about a month. It eventually was killed by a sun anemone that I stupidly put in the tank as they are deep sand bed anemones that I thought would look cool in the tank has turned out to be a sort of sand habitat tank.