noun
soup garnish
Refers to solid ingredients floating on top of soup, such as vegetables, tofu, or seafood, added for flavor and presentation.
吸い物に浮き実として三つ葉をのせる。
Place mitsuba on the clear soup as a garnish.
この味噌汁の浮き実は豆腐とわかめです。
The garnishes in this miso soup are tofu and wakame seaweed.
具 refers to solid ingredients in a dish in general, while 浮き実 specifically means ingredients that float on top of soup as a garnish.
吸い口 is a garnish placed on the rim of a soup bowl for aroma, whereas 浮き実 floats directly in the soup.
Compound of 浮き (uki, 'floating') + 実 (mi, 'fruit, seed, content'), literally 'floating contents'.