Genus: Ceratophyllum print
- Cellular forms
- Domain: Eukaryota
- Kingdom: Plantae
- Subkingdom: Embryophyta
- Division: Angiospermae or Magnoliophyta
- Class: Dicotyledoneae
- Family: Ceratophyllaceae
- Genus: Ceratophyllum
- Species: Ceratophyllum demersum - Rigid Hornwort
- Species: Ceratophyllum submersum - Soft Hornwort
- Species: Ceratophyllum tanaiticum