Answer:

sterlet

Answer	Crossword Clue
STERLET	Caspian Sea sturgeon
STERLET	Caviar fish.
STERLET	Source of caviar.

STERLET	Small sturgeon.
STERLET	Sturgeon.
STERLET	Caviar sturgeon.
STERLET	Food fish.
STERLET	Choice Caspian sturgeon.
STERLET	Whence caviar comes
STERLET	Small sturgeon
STERLET	Source of excellent caviar

STERLET	Caviar source

Crossword

a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.