Racing sleepy lizards as a fundraiser has landed South Australia's Sports Minister in hot water.

Questions have been raised about whether Tom Kenyon broke the law when he got involved in the lizard racing at a party last weekend.

Mr Kenyon says the event raised money for a school.

Opposition environment spokeswoman Michelle Lensink thinks the minister is setting a bad example.

"I think given the position that the minister's in, he ought to set a good example and I actually think it's quite appalling and I wouldn't be surprised if those poor lizards were quite traumatised after their experience," she said.

Mr Kenyon says the lizards were not harmed and were returned to the wild after the racing.

But authorities said the minister appeared to be in breach of national parks and wildlife regulations.

It is illegal to interfere with, harass or molest a protected animal.

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An Environment Department official later said the minister would not be issued with any warning, because he had not been the person who collected the lizards from the wild.