The supermarket giants have this week cut the price of whole lobsters from Western Australia to $22 each, down from the regular price of $27.
Woolworths is forecasting Australians will eat more than 100 tonnes of WA rock lobsters during the three weeks of Christmas.
READ MORE: COVID-19 daily cases soar to 5715 in NSW
The luxury seafood is expected to sell out quickly, Woolworths commercial director of meat and seafood Tim Dudding said.
"WA rock lobsters were one of our most popular products during last year's Christmas season and we saw incredible demand," Mr Dudding said.
"We've continued to offer rock lobster through the year and have nearly doubled our order this Christmas, as customers look to support local Australian producers and make what's traditionally a delicacy more accessible."
The move came after Coles announced it was cutting the price of its Australian rock lobsters.
In selected stores across the country, Coles is also offering WA Rock Lobster tails and extra-large WA Rock Lobsters for the first time ever, while keeping the prices low for customers to enjoy ahead of Christmas.
Coles' general manager for bakery, deli and seafood, Andy Mossop, said the supermarket is expecting its biggest week of the year for seafood sales with customers buying more than 70 per cent additional seafood compared with an average month.
"We are delighted to be able to make great quality and responsibly sourced Australian seafood like WA rock lobsters more affordable so more Australians can treat themselves this Christmas Day," Mr Mossop said.