Black thread like growth from top of plant ?

I have what I believe to be some sort of Java fern in my daughters 10 gallon tank. It has developed black "hairy" looking growth from the ends of it's leaves. On some of the leaves it is as long as 3 to 4 inches.

Just wondering what this is... It does not appear to be bothering the plant or the tanks inhabitants.

Any advice is appreciated... ;D

 

it kinda sounds like roots to me, but i've never seen them be 3-4 inches without plantlets forming. hmmm

 

Those are roots for a new plant. that's how Java fern multiply So congrats on having java fern happy enough to multiply
Carol

 

SWEET!!!

I was getting worried and thought about doing some clipping... Glad I asked first.. ;D

 

You should see tiny little leaves pretty soon. If you leave them long enough they will drop off and float around or you can wait until they get about an inch long and clip them off either way works fine.
Carol