Transgenic Fish - Gene transfers have been successful in several fish, e.g., common carp, rainbow trout, Atlantic salmon, catfish, goldfish, zebra-fish etc. The genes transferred into fish include salmon or rainbow trout growth hormone, chicken 8­crystalline protein, winter flounder antifreeze protein, etc.

Transfection is achieved either by microinjection of the DNA construct into egg cytoplasm or by electroporation. Microinjection is performed within few hours after fertilization. Transfected ova are cultured in water where they hatch.