הַֽתְמַלֵּ֣א בְשֻׂכּ֣וֹת עוֹר֑וֹ וּבְצִלְצַ֖ל דָּגִ֣ים רֹאשֽׁוֹ׃
Canst thou fill his skin with barbed irons? Or his head with fish-spears?
Rashi on Job
Will you fulfill Will you fulfill your desire and make tents of his skin?
Rashi on Job
or a shade of fishes of his head Will you make from his head a shade of fish? This is a repetitious expression.
Rashi on Job
a shade Heb. צִלְצַל, a tent of fish. A tent made from his head is called a shade of fish because it is made from him.