is it true they grow a lb a week?

this time of year yes

thats what I was thinkin also, thanks seastrike

It's a generally accepted rule of thumb. I have heard that all my life. I suspect there are plenty of exceptions, but I can see how a 14 lb fish might pick up a pound in a week. I doubt a four pound fish would.

I think it's a little less than that on inland waters. I can tell you, anecdotally, that I was catching a lot of 2 and 3 pound resident silvers in Early August, and now I'm catching a lot of 4 and 5 pounders. they look like cookie cutter fish, and all are in central Puget Sound, so I'm thinking they're the same group of fish. That would translate to a pound every two weeks.

I think the fish in the ocean, especially the bigger ones, probably do put on that mch weight when the conditions are right.