Nelson Haven is an extensive area of mudflats northeast of Nelson, New Zealand. It is separated from Tasman Bay / Te Tai-o-Aorere by the Boulder Bank and over 8 km long and up to 2 km wide. The area is regularly completely drowned and exposed by tidal action and supports a large population of mud crabs.

Water channels in Nelson Haven

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41°14′24″S 173°18′18″E / 41.24000°S 173.30500°E / -41.24000; 173.30500