Do you need a license to fish here, even if you throw all the fish back?

Yes

Sorry I don't fish could not answer

Yes you do

You will needed licence to fishing in any Water Of Florida but if you are over 65 years old you are exempt

I've also heard if you have food stamps you do not need a fishing license

Yes, unless you are fishing at a bridge you need a license. Black Point is in a National Reserve....

indeed