My tail spot blenny, when I got him and 2 other fish, I saw him the first day then he was gone. Honestly forgot about him. A few months later I saw him dart out amd back in the rocks from the side of my reef but close to the back. And I couldn't for the life of me figure out what it was that I saw. Few more months go by and not seeing it again forgot about what I saw and then one day (now 6 months after I originally got him) during feeding time this little guy shoots out of the rocks to front and center eating with the rest of the crowd. At first i was like where'd this fish come from. Even questioned my my wife if she got a fish and didnt tell me(haha like that would ever happen, she dont buy anything for the tank, except that one time she came home with gsp and clove polyps) then I remembered, holy cow, its alive hah. Now a year since then he is always out, lives in a hole in the very front,top of my reef. Go figure.