Above, fresh mahi mahi harvested from the sea. A handful of cell-based seafood companies are attempting to create fresh fish species, including mahi mahi, in a lab — where they will be grown without a head, tail, skin or bones.

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Above, fresh mahi mahi harvested from the sea. A handful of cell-based seafood companies are attempting to create fresh fish species, including mahi mahi, in a lab — where they will be grown without a head, tail, skin or bone