Former All Black Josh Kronfeld is among thousands of Kiwis who have submissions against seabed mining, an anti-mining group says.

Kiwis Against Seabed Mining (KASM) said thousands of submissions had been made to through their website to the Environmental Protection Authority objecting to an application to mine ironsands off the seabed on the West Coast.

Kronfeld's submission stated: "Kiwis love our black sand and to sell them off to an international company that will ship it off to Asia, leaving us to deal with the major threats to the environment is simply irresponsible," the group said.

Artist Nigel Brown and surfer Dave Rastovich, who paddled from Taranaki to Piha last year to raise awareness around the issue, have also lent their support to the cause, KASM said.

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Submissions close on Thursday at 5pm.