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Often a pellicle will form on the surface of the beer inside the bottle shortly after packaging. This is no different than the pellicle forming in the fermentation vessel, and presumably occurs because of the oxygen in the headspace of the bottle. The pellicle will eventually settle out either on it's own during aging, or when the bottle is refrigerated. Other than for aesthetics, there should be no concern if this happens.
Pierre Tilquin of [http://www.gueuzerietilquin.be Gueuzerie Tilquin] suggests that storing bottles horizontally on their side during bottle conditioning will prevent a pellicle from forming in the bottles. This is a common practice among lambic brewers, and when Pierre stored bottles upright he saw the formation of a pellicle in his bottles of lambic <ref>[https://www.facebook.com/groups/MilkTheFunk/permalink/1210209235673955/?comment_id=1210248462336699&reply_comment_id=1210254505669428&comment_tracking=%7B%22tn%22%3A%22R8%22%7D Conversation with Pierre Tilquin and Raf Soef on MTF. 01/08/2016.]</ref>. Gently shaking tipping the bottles so that the pellicle dissolves into the beer or even just standard handling will also destroy dissolve the pellicle without harming the beer.
==Scientific Terminology==