金魚藻
き
ん
ぎょ
も
Meanings
1
Eurasian water milfoil; Myriophyllum spicatum
Specifically refers to the aquatic plant Myriophyllum spicatum. Colloquial term used in aquarium and pond contexts.
See also: ホザキノフサモ
Eurasian water milfoil is often placed in goldfish tanks.
2
aquarium plant; hornwort; waterweed
Broadly used for various aquatic plants kept in goldfish tanks, including hornwort and similar species. Not a strict botanical term.
I bought some aquarium plants at the pet shop.