Lobster Fact Of The Day:
One of the most remarkable phenomena of the lobster is reflex amputation. It will throw off an appendage when stimulated by shock, fear, or injury. In this way, it sometimes does itself serious injury to escape a worse fate. However, it has the power to regenerate, or grow back, a new part. A lost claw, walking leg, or antenna will increase in size with each successive molt.
Source: Department of Maine Resources Lobstering Guide