The sheriff's office said the seized goods were "literally enough to kill every single resident" in the county.
The juvenile alligator was sent to a local zoo. The suspects were sent to a local prison.
The president is considering how to tackle the problem.
'This seizure alone contains enough potency to kill half of the population of New York City, if laboratory analysis proves it is all fentanyl,' special agent says.
The country's new president, Rodrigo Duterte, has voiced support for the deaths.