Lungfish missing fin?

[Cowturtle]

Hi, I have a similar problem as your fish above, my lungfish's fins got ripped off by my terrapin. Mine is an Marbled Lungfish, if I'm not wrong. Will it still grow back, even if the two species are different?
I have a photo of mine below, please correct me if that's not a marbled lung.View attachment 1272554

It is a marbled lung. Those are pretty minor injuries it should regrow no problem.

 

[Crocoduck]

Okay, thanks. My terrapin is about 9" long, I've kept him since '05. He's relatively docile with the other fish in the pond, which are two blood parrots and an oscar. So how large should I let my LF grow to before putting him back in the pond? The pond is about 215 gallons. Thanks!

 

[Cowturtle]

Okay, thanks. My terrapin is about 9" long, I've kept him since '05. He's relatively docile with the other fish in the pond, which are two blood parrots and an oscar. So how large should I let my LF grow to before putting him back in the pond? The pond is about 215 gallons. Thanks!

I'm not sure even a full grown lungfish can probably get his fins torn off pretty easily.