I've had a java fern in my low light goldfish tank for about five months. I'm waiting for a baby plant to grow so I can put it in my soon to be betta tank. The fern has grown in size, I can notice more leaves coming off it and such. On the end of one of the leaves, theres this brown thing.. not sure what it is, but its growing off the leaf. It is shaped like a "v" and is growing outward.
My Java Ferns all have baby plants. They seem to start as a raised, brown bump/dot on the back of a leaf. From that brown dot will eventually grow brown, fuzzy looking roots. Finally tiny little leaves will grow. I haven't bothered to remove any of the baby plants but I probably will when I start up my next tank. Posted via Mobile Device
Yup, those are roots. You have a happy java fern. :)
Wat til the babies have a few leaves each. Then clip off the leaf with the babies on it and tie it to a piece of wood with some cotton. The cotton will rot away in time. Java fern likes growing on other things, not in substrate, and it won't take long for the babies to attach themselves. Or you can leave them floating.. I prefer wisteria for floating,though as java looks kind of messy after a while.