An Auckland eco-tourism company are offering people a first-hand look at how much plastic is in the ocean.
The dolphin and whale watching business wants to get more people enthusiastic about protecting our oceans.
A class of ten-year-olds spend a day on the Hauraki Gulf watching dolphins and whales in their natural habitat.
The experience got the youngsters thinking.
"We have to preserve them for future generations, if we don’t look after it it’s just a big part of earth is going away," one child said.
The operators of this eco-tourism company monitor the Hauraki Gulf’s levels of vital plant and zoo plankton.
But mounting concern about plastic in the ocean is seeing it being tested for too, with samples gathered while the boat is moving.
The particles are so tiny they now have to be examined under a microscope to determine whether they're plastic or plankton.
It's a chance for visitors to see first-hand exactly how clean the sea around New Zealand.
Marine researcher Georgia Balfour says we need to be more aware of what's going into the ocean.