anemone reproduction

I just witnessed my bta releasing a egg package into the water column. An hour after the lights went off, i was sitting at the table and saw a "ball" shooting out of her mouth. It immediately floated to the top. I catched the package and put it into a floating container. How do you even care...

I've had a lot of baby rock anemones in my aquarium and I just wanted to know what it looks like before they spawn

Quick question which might seem silly to a more experienced saltwater aquarist: can anemones grow back from severed tentacles? Unfortunately, I lost a BTA yesterday, but it dropped a few little tentacles into the tank which are still bright green after several hours. Can they grow a whole new...