Mrs Mathews, who grew up at Whangapae and has spent her life by the ocean gathering seafood, said three of those nabbed were her family members.
"I'm sick and tired of people blaming outsiders ... it's our own people! All you are doing is stealing from our mokopuna because there will be nothing left for them and it will be up to them to try to bring the paua back from extinction," she posted on Facebook.
"Take a good look people because if you don't wake up now then you might as well kiss our kai moana goodbye."
She said some of the plundered seafood was being sold locally but believed some was being sold in Auckland.
"And if you are buying them from these mongrels then you are just as much to blame.
"Ten per person per day is plenty to feed a whanau. And it's not about playing by the white man law. You all want to moan about the fishery officers ... yet you'll sit back as quiet as a mouse when there's a kuzzy selling off paua."
She said it was sad to think in 20 years' time people might look at an empty paua shell and only wonder what it tasted like.
To stem the plundering people needed to report suspicious behaviour, record vehicle licence plate numbers and ring fisheries officers immediately, Mrs Mathews said.
"We can't just keep turning a blind eye and hope they learn.
"If they are named and shamed by their own people. Going back to the marae is more embarrassing than any fine."
Education was needed about the life cycle of paua so people knew how long it took for the shellfish to grow to a legal length.
MPI District Compliance Manager for Northland Steve Rudsdale said with continued breaches on a regular basis, the ministry had severe concerns for the paua fishery in the area.
"The continued blatant disregard for the fisheries legislation shown by the local people is hugely disappointing, behaviour like this threatens the sustainability of the resource for future generations."