The largest haul of illegally caught paua this year was likely destined for the black market, fishery officers say.
On Tuesday officers caught a man near Wainui in Akaroa Harbour with 248 paua - well over the legal daily limit of 10 per person.
The officers had seen three men diving in the harbour and waited for them to come ashore.
They found one of them in a cave shelling the paua, most of which were below the minimum legal size of 125mm.
Field operations manager Peter Hyde said it was the largest apprehension so far this year, and summer hadn't even started yet.