EGGCRATE WILL NOT, I REPEAT WILL NOT KEEP THIS FISH FROM JUMPING!!! I had tiger jaws and lost two to surfing before I covered the tank, the last one I sold for his penchant for burying my frags. I set up a new tank and one of the showpiece fish was to be the bluespot. I waited months to get it. Spent half an our covering the top with eggcrate, putting a 2" strip of solid plasic around the rim of the tank. My light fixture sat 2" from the top of the tank. I got the fish, and two weeks later my black occelaris moved into his cave with him. After they chewed on him a little, I reaquascaped, removed an isopod from the jaw, fed him special food and nursed him back to health. He made a new sweet home between two colonies of Blasto Merlettis, and then two weeks later rewarded all my hard work and tending by greeting me as a piece of fish jerky next to my powerstrip. I'll never own one of these $#%@&^ fish outside of a sealed system again!!!!