I almost tried the tweezers, but she sucked the tails in instantly once she was in the net. I gently squeezed her sides, but nothing happened. She seemed fine otherwise, so I decided messing with her would do more harm than help, but sometime last week she lost her appetite and wasn't as active as normal. The next day she was dead. I have no advice for anyone else in this situation, except not to try the squeezing or the tweezers. Holding fish can damage their scales and fins since the natural oils on our skin are bad for them, and it didn't help in any way. Ultimately, I'm not even positive about why she died, but a blocked birth canal is my best guess. Thanks for the help, hopefully this is a rare problem...