This is an "Everhungry" from Leviathan, a game produced by Grendel. It is a resin-casted miniature, and was really enjoable to paint due to the fine details.
Thanks for the information, Brushguy. I have modified the description to reflect your comments. Does anyone know if Grendel still produces these miniatures? I have a few other pieces that I have not painted yet that are also of wonderful quality. Thanks for the kind words, Brushguy!