I have been offered an AU lungfish which is about 18months old and only about a foot plus long. The problem with this lung fish is that a murray cod has bitten on the front left pectoral fin... its litterly a stub. My question is will this grow back. Im assuming not but just wondering. Im tempted to swap for him as the owner wants my gator gar... the lunggie looks like he really needs some TLC ... its quite pale and looks underfed.