Hornwort

Ceratophyllum demersum — 金魚藻

Ceratophyllum demersum (Hornwort) is a fast-growing, rootless stem plant that floats freely or can be loosely anchored in substrate. Its dense, needle-like whorled leaves provide excellent cover for fry and shrimp while competing aggressively with algae for nutrients. A very forgiving and adaptable plant for virtually any freshwater setup.