In the realm of marine biology it has long been observed that both
starfish and lobsters have very unique traits which, to the best of current
biological knowledge, do not occur elsewhere in nature. For one, starfish
have regenerative capabilities: if one were to cut off the limbs of a
starfish (as many unknowing fishermen have often done) it does not actually
kill the starfish...in fact it creates five more in its place. Biologists
know that this is an advanced form of budding, but they do not know how or
why.
Parallel to this is the growth of lobsters. In controlled experiments, scientists have not been able to observe lobsters dying of "natural" causes. In addition, their growth rate is not known to subside with age: their apparent cellular reproduction causes them to continue growing until the accident curve picks them off. As far as anyone knows, there could be 300 year old lobsters living in the deepest areas of the oceans.