You can put them in the Rio Grande, if the sharks can stand fresh water.
“if the sharks can stand fresh water”
that would require genetically engineering a whole new species of sharks ...
https://www.google.com/amp/s/retrieverman.net/2009/05/19/the-strangest-shark-story-ever/amp/
Bull shark caught in the Mississippi river at ST LOUIS! yup Bull sharks are some no crap predators.