I have some ferns growing off some driftwood in my aquarium and they've started to develop some growths on the back of the fronds. I've done some googling and I can't find anything quite like it. I'm assuming they're some type of bulbet and this is a propagation mechanism, but they don't look like any of the bulbets coming up in my searches. I'd like to make sure it's not parasitic or any other issue. The ferns seem otherwise healthy. If they are bulbets any care information would be welcome. Thanks!
