Answer: STERLET

AnswerCrossword Clue
STERLETCaspian Sea sturgeon
STERLETCaviar fish.
STERLETSource of caviar.
STERLETSmall sturgeon.
STERLETSturgeon.
STERLETCaviar sturgeon.
STERLETFood fish.
STERLETChoice Caspian sturgeon.
STERLETWhence caviar comes
STERLETSmall sturgeon
STERLETSource of excellent caviar
STERLETCaviar source
sterleta small sturgeon (an edible fish)
sterletsmall sturgeon, Acipenser ruthenus, of the Black and Caspian seas, valued as a source of caviar