Scientists battling the arrival and spread of exotic plants, fish and animals are asking the public to let them know if they notice anything unusual on beaches or waterways they know well.
A principal NIWA scientist John Clayton, who is a specialist in aquatic biosecurity, says anyone who sees something unusual should take a photograph, write a description and note the location where it was found.
Dr Clayton says both the Department of Conservation and NIWA want to be able to assess whether unwanted organisms are spreading, and are keen to hear from the public.
