When should I feed my gobie?

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I have a court jester gobie that I have had for a little over a week now. The only time I ever see him is in the morning shortly after I turn the lights on. He's always in the same place which is right outside his little cave area. I generally feed my fish (a clown and dottyback) in the evening, but I don't see him and by that time the mushrooms that grow over his cave are generally concealing all his entry points. So should I be feeding in the morning? I usually alternate between frozen brine shrimp, mydriasis shrimp and flakes. I was thinking may I should feed a cube of shrimp in the morning and then some flakes at night?

- pp