plant

Ceratophyllum demersum, L.

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Hornwort, rigid hornwort, coontail, or coon's tail

Ceratophyllum demersum is a perennial and rustic plant that floats freely in calm and nutrient-rich waters. It can form a dense subsurface canopy and reach of height of 5-6m and frequently grows as a mono-specific community.
Submitted by
Natasha Khardina
GPS
-9.6349087, 148.6232910
Geographical region
Oceania
Drainage Basin
River catchment
Water body type
Stream
Water body name
Nameless affluent
Water body part
Water body course
Lower course
Water body: tributary of
River
Tributary name
Safia
Type locality
Cosmopolitan distribution, native to all continents except Antarctica
Conservation status/IUCN Red List
Not Evaluated (NE)
Listed in CITES
No

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Water Chemistry

Water information

Water type
Fresh water
Water color
Clear water
Water transparency
Medium
Concentration of sediments
Medium
Water temperature
°C
Water flow/curent
Slow

Chemical parameters

pH
Conductivity
GH
KH
Dissolved Oxygen

Phytology

Plant form
Submersed
Plant type
Stem
Plant size
5-30+ cm
Plant growth rate
Fast
Plant light demand
Low
CO2
Low
Aquarium equipment

It will grow in waters that are clear or turbid, still or flowing, and warm or ice-covered.

Plant care

Ceratophyllum demersum occupies a wide depth range, between 0.5 and 15.5m. It is classified as a shade-adapted species.

Ceratophyllum demersum has been spread throughout the world via the aquarium and pond trade, and is considered to be a weed of waterways in many regions of the world, due to its ability to spread rapidly, invade a wide range of aquatic habitats, and grow to deeper depths than some other weed species.

Water care

Ceratophyllum demersum is found in ponds, lakes, ditches, and quiet streams with moderate to high nutrient levels. It is a brittle, poorly attached plant, which is prone to dislodgement by water currents and wave action.