white whale; beluga
Refers to a white-colored whale, especially the beluga whale. Also used as the Japanese title for Melville's 'Moby-Dick'.
I saw a white whale at the aquarium.
Melville's 'Moby-Dick' is a famous novel.
baleen from a gray whale; whale whiskers (for crafts)
Specifically the baleen plates (whiskers) from a gray whale, traditionally used in crafts such as making combs or ornaments. Not a common everyday word.
Baleen from a gray whale is used in crafts.
Compound of 白 (しろ, 'white') and 鯨 (くじら, 'whale'). The reading しろくじら is a straightforward kun'yomi combination.