very proud of your guys also if you want to release a fish you have to do it after you unhooked it right away may be allowed to take some photo but make sure it's not too long time hold a fish toward head stream let water run through mouth and gill for a while then release it. I love when saw you take a water bottle out of a nature too. you right it's have weight when you carry it to go fishing but it's will empty so no reason for people to refuse to carry it back to a trash. also all fishing line don't leave it in nature no matter in a water or on land it can tangle fish and animal and make them a hard time for living . In USA almost 85% of sport fisherman catch and release just take a picture and a good memorized back home.
sorry to type in ENG because I didn't have a Thai font