Eastern region Fish and Game manager Rob Pitkethley said it was a timely reminder that
everyone who fished for trout needed to ensure they held a current trout fishing licence.
"It's also a wakeup call for anyone who thinks they can obstruct a Fish and Game ranger and get away with it.
"It's something that's taken seriously, and anyone who tries it on is held accountable.''
Mr Pitkethley said income from licence fees was used to manage and maintain trout fisheries.
"So anyone who fishes without a licence is freeloading on all the law abiding anglers who have bought a fishing licence.
"So when you're caught without a licence, expect to be held accountable and pay a penalty that runs to well above the cost of that licence.''