User blog comment:Lord Loss/Monster Hunter Theory... Blog/@comment-4555457-20120207224848/@comment-4639789-20120211210203

I had the same thought a while back. How about ice agna digging chambers underneath the ice, and the young agnas get fed by regurgitating from the parent(s) and when the young agnas are strong enough they break out the chambers and move on to live on the surface.