Baby Blue Legged Dwarf Hermit!

Hi guys, new to the site so "hello" ok background is new tank 4 months ago, let it do it's thing for a month with live rock & sand. Then added cuc one of which was a blue legged dwarf hermit. Anyway, tanks doing really well was looking in tonight watching the crabs and I noticed my hermit dragging a small shell up the rock. Thinking he'd lost the plot and was wanting to get in it, I watched a bit longer. Then suddenly out of this little shell pops the smallest blue legged hermit I've ever seen! So my question is, was I very lucky and it came on my live rock? Or did my hermit have babies early on & this is a very lucky survivor? Thanks

 

Welcome to 3reef. You have posed a great question and both are possible but I have no idea which wold be correct.