Shellcove Fish and Chips opened at the Waterfront Dining Precinct on March 27, just two days before what is widely recognised as the biggest fish-eating day of the year, Good Friday.

Owner Scott Schofield, who also operates two other locations in Unanderra and Berkeley, says he's well prepared for the big day.

"We can do anywhere up to four times a very good week," Mr Schofield said about Good Friday.

The three shops will sell "easily a ton" of chips between them - and more than 2000 fish cocktails on Friday, Mr Schofield said, but he admitted predicting exact amounts is difficult.

"It's not a holiday where people pre-order things. I don't know if people want to get out and order it fresh."

Mr Schofield says he and his family found out the hard way just how much fish people buy on Good Friday.

"We did probably 350 customers at Unanderra - my brother and I and our two wives [as the only employees]."

Shellcove Fish and Chips prides itself on using fresh ingredients and strives to be "old-school fish and chips".

"I worked at five-star hotels and hatted restaurants and stuff like that.

"We just like serving people good food and just do everything fresh."

Now all you need is a coffee.