Boaties are being urged to show more care after several incidents with marine mammals over summer.
A female orca with a dead calf, believed to have been killed by a boat strike, was reported off Tiritiri Matangi Island prior to Christmas.
The Coastguard and Department of Conservation also responded to reports of dolphins being harassed by boats at Whangaparaoa, Leigh Harbour, Omaha Bay and by boats approaching “boil ups” of fish, which dolphins drive to the surface.
Marine mammal regulations require boats to travel at less than 10 knots within 300 metres of any marine mammal and to approach them from behind and to the side. No more than three boats, including stand up paddle boards, are allowed at any one time within 300m. Boats are required to keep at least 50m from whales and orca and 200m from a mother and calf. Swimming with seals and dolphins is allowed providing there’s no young, but not with orca or whales.