It would happen only if a certain gene from the crop confers a selective advantage on the recipient--an occurrence that should be uncommon with biopharming, where most often the added gene would make the plant less fit and less able to proliferate.

FORBES: Food Fight

Unlike human fishing techniques, which tend not to discriminate between sick and healthy specimens, sharks are selective: they target weakened prey, thereby keeping fish populations healthy and strengthening the gene pool.

UNESCO: Open Access to Scientific Information