...
as you see that's only the beggining of it, we'll soon have to add stuff concerning large scale education or countries to implement international regulations, to accept new technology and so on..
Possible ideas (brainstorming):
blacklisted rule breakers
affordable aquarium tickets
advertisement campaigns
use NGO powers like Green Peace
international competitions
focus on largest consumers of fish to have them put pressure on fisheries
other ideas??? add them!