Let he/she who is without sin cast the first stone!
Is it a matter of degree, or are we talking a moral/ethical issue here?
If so, is the unemployed person who sells their catch any different to the person who gives excess fish away, for whatever reason?
When you have enough fish for your family, isn't it time to stop?
Just my 2 cents, don't want to get too heavy, God knows I've given the odd fish away myself and I don't consider myself as opportunistic as say, a local disability pensioner who offloads the odd mulloway or 10!
Guess we all have to live with our own consciounces!
Cheers!