Some pearl-shaped bubble foods have been with us for a long time — not fads at all. Perhaps the classic is caviar, and fish ...

Tiny sphere-shaped foods seem to be everywhere, entertaining mouths with their pop-ability and the sometimes unusual transformation of familiar foods.

California-based Tsar Nicoulai, for example, offers gold pearl trout roe for about $14 an ounce; it’s bright orange with a firm shell and a silky, distinctive pop. Their Estate Malossol Caviar ...