What is this plant?

[RainbowDragon28]

It was sold as "Green Frill". Is it Hornwort? Myrio? I can't tell.

Thanks.

[BlueWaterFX]

I'd say Hornwort (coontail)

[brianna021]

That looks identical to the plant I keep in my goldfish aquarium.

Its a Cabomba.

[madagascariensis]

Cabomba leaves do not really branch out like that, I personally
Would guess myriophyllum or water milfoil.

Look closely at the leaf structure. Cabomba leaves fan out from the same branching point but myriophyllum looks like a skeletal leaf.

[escamosa]

Possibly a Eurasion Milfoil?

[brianna021]

:$ then i guess mine is not a cabomba...

[RainbowDragon28]

If Cabomba leaves branch from a central point, then this is definitely not Cabomba.

It does look a lot like Eurasian Milfoil. There seems to be a lack of high-res images of aquatic plants, which certainly doesn't help in situations like this. However, according to the "ID Card" PDF near the bottom of this page (http://dnr.wi.gov/invasives/fact/milfoil.htm), it's not Eurasian. It says that Myriophyllum spicatum has 12 to 21 leaflet pairs per leaf, but I only count 7 to 9 on my specimens, which is consistent with their native representative. What my plants do seem to share with Eurasian are feathery leaflets, and that contrasts with the native example's thicker ones. All of this leads me to suspect that it's a Milfoil, but not Eurasian.