I just did a little research on the specific scientific name of my plants.
I do NOT have giant duckweed, or giant salvinia. Mo is partially correct, the giant varieties Salvinia Molesta and Spirodela polyrhiza are often illegal.
The variety of duckweed I have is the butterfly shaped, called Lemna minor and is infact native to Carlifornia
The salvinia species I have is Salvinia natans
Both are legal in California.
Thank you Mo for the heads up.