I have been fishing with live bait and had preditor fish eating one type of live baitfish and not another. Litterally fishing them in the same area, time and time again they would hit one and not the other. The one that was being hit is the one that was readily available, it seemed the fish had really keyed in on that one particular bait fish.

Goofing off is a slang term for engaging in recreation or an idle pastime while obligations of work or society are neglected........... Wikipedia