So i pick up my 5 cleaner goby from aa yesterday. ..I put them in my tank and started to work on my client for about an hour then when I came to check out my new fishes they r nowhere to be found ...The only time I saw them was when I release them in the tank and they went to go hide right away...I tried to feed the tank so they can come out but they don't... they're just gone ...I search high and low ...this sucks.... Can anyone explain this. ... how can all 5 be gone