What's up at Ocean Beauty?

About a week ago the Feds served warrants at three of Ocean Beauty's plants. To date, no one has made the contents of the warrants public. Rumor has it the searches were about some seafood imports by OB. But here is the part I don't get. Three federal agencies were involved in serving the warrants; the FDA, Customs, and Immigration. What does Immigration have to do with the seafood business? Did someone stow away in a van or what? As soon as I find out I will post it.