If all of the cards in it are natural , it is called a natural or red Canasta ; the cards are squared up and a red card is placed on top .
A Canasta is a meld of seven cards .
If all of the cards in Canasta are natural , Canasta is called a natural or red meld ; the cards are squared up and a red card is placed on top .
A Canasta is a meld of seven cards .