Well, yesterday I got all exited because I got my first saltwater fish, right? and I acclimated It to my aquarium, and It was doing just fine. all my water levels were good, and he ate a couple flakes. It`s all cool. But then I wake up the next morning and my little fish is hiding under a cave, opening and closing his mouth. I`m pretty sure He`s fine, maybe just in a little shock. but then I go on a couple errands, and when I come back, He`s gone. The tank was well covered, and I moved around the liverock, checked inside the filter, and I`m pretty sure he didn`t jump because the tank was completely covered! I`m really bummed out, though, And I don`t know where he could be! My first freaking saltwater fish, too!