BELUGA

White whale (6)

Solution has appeared in 2 crosswords (2 across and 0 down):

• Quick crossword No 16,007 — 2021-08-25 23:00:32
  1A: Source of caviar, found in the Black and Caspian seas (6)
• Quick crossword No 15,254 — 2019-03-29 00:00:08
  19A: White whale (6)