Mr Singer said one person was arrested on matters unrelated to the recovery of the paua, which is now the subject of an investigation into what is believed to be a commercial operation.
The reports of suspicious activity coincide with a rise in farm and household thefts in the area.
In a separate event at Kairakau Beach, four people were spoken to and 97 paua were seized by staff. Ninety four of the paua were undersized.
Six undersized rock lobster were also seized. All four people spoken to face prosecution.
Mr Singer said with the recent good weather and clearing sea conditions, there has been an increase in illegal fishing on the coast.
- Police urge residents and beachgoers to report all suspicious activity to the Ministry of Primary Industries on 0800 4 POACHER (0800 476 224) or Crimestoppers on 0800 555 111.