鲟鱼因其珍贵的鱼子酱而被过度捕捞，导致数量急剧下降。

___Sturgeons are overfished for their valuable caviar, causing a sharp decline in their population.

这家餐厅的招牌菜是香煎鲟鱼。

The signature dish of this restaurant is pan-fried ___sturgeon.