Panopaea zelandica Quoy and Gaimard, 1835Panopaea solandri Gray, 1843 Panopea zelandica, commonly known as the deepwater clam or New Zealand geoduck, is a large species of marine bivalve mollusc in the Panopea (geoduck) genus of the family Hiatellidae.

It is found around the North, South and Stewart islands and occurs mainly in shallow waters (5–25 metres) in sand and mud off sandy ocean beaches.

Like other geoducks, P. zelandica burrows downwards in the mud and extends a siphon 30-45 centimetres up to the surface of the substrate.

[9] This process typically takes place during the warmer months, as the temperature change triggers reproduction.

[11] Thus, fishing P. zelandica has proven to be unsustainable naturally and to continue this practice, will need some form of man-made modifications.

[10] Geoduck fisheries are a very lucrative business in the Northern Pacific part of the United States, areas of China, South Korea, and Japan.