I’ve used a opera net in the surf at okains bay and even got a few.
I walked out to waist deep and dropped the pot and ran a reel of 50lb nylon back to the beach where I was fishing. worked good calm conditions wouldn’t try if was rough.
One day I was swimming at caroline bay timaru with my kids and a guy came past towing a slab of old fish on a string the paddle crabs would appear out of the sand he was just grabbing them and chucking them in a bucket. (he came from the west coast to get them???)