"At Kaikoura, maybe once a year, every other year, you might have a leopard seal haul itself out for a little while.
"You see them at other places around the South Island and sometimes in the North Island."
Ms Boren said sightings of leopard seals were not seasonally dependent and might have more to do with the age of the individual seal.
"If they are not a breeding animal, they can travel quite big distances and haul out to moult."
Ms Boren said leopard seals were one of the top three marine predators with massive heads and powerful jaws.
"They are the ones you want to stay away from."