Its been a really long day at work, just got out of the shower and was looking forward to eating the full box. I'm staying in a b+b on work nights and left the grapes in a drawer. Now the box is full of fucking crawly black ant bastards.
Agree with Yoni, god knows what's on fruit before we buy it. Just give them a jolly good wash and enjoy them.
Just to put your ants in perspective OP. Long ago, my now exh, once put some grapes on the dining table at the end of a meal. I give him the 3rd degree about how well he'd washed them as I didn't trust him, but he insisted he'd cleaned them thoroughly. I sat there eating these delicious juicy grapes and suddenly noticed down among the bottom one some weird brown and yellow stripes. I lifted them out of the bowl and found the most enormous snail I have ever seen nestling there. I don't know if it was still alive as I didn't hang around long enough to find out.
Needless to say it was years before I could eat another grape.