i have two dragon gobys, one about 6in and the other about 4in. i thought the 4in was missing because he was nowhere to be found in the tank for three days.. last night i finally saw it just chillin in the open. and now i cant find the 6in.. i figured it would be under the gravel because thats what my peacock eel does.. but i cant seem to find it. do these guys have a habit of turning invisible? 
