Large Fish That Yields Caviar
Puzzle 18 of Christmas Carols Piece of Cake Pack
Question is: Large Fish That Yields Caviar
and the answer is: STURGEON
Word Meaning:
STURGEON — Any marine or freshwater fish of the family Acipenseridae that are prized for their roe and are endemic to temperate seas and rivers of the northern hemisphere, especially central Eurasia.
Definitions from Wiktionary.