If your timing is good you can get'em down at the fish distributors in San Pedro.
I walk up with an ice-chest and get what I need for nuthin' out of the dumpsters on the loading dock.
I'm usually there grabbing some blocks or packages of squid (eaters) also.
It's just down the street from 22nd street landing.
If you enjoy the smell of fish, I do, and you want to nose around, you can also get some good fish 'info'.
. . .was going to say 'dope' but someones g-string might shrink.