The trawl fishery is just like open pit mining or mountain top removal, very efficient but devastating environmentally. Until the fleet is forced to bring everything back to port, zero discard, their dirty secret of wanton waste and destruction will continue. If this were the case it would become obvious this method of harvest will never be sustainable. Just like other destructive resource removal methods big money influence will fight tooth and nail to continue with their greed and likely won't be stopped until the damage done becomes so enormous that it becomes obvious there is no other choice but to stop it.