What is the Evolutionary Advantage?

We have 5 fingers, not 4 or 6.

Starfish and Echindodermata, the other phylum in the deuterostomes, have pentaradial symmetry.

So I ask you, /sci/, what is the EVOLUTIONARY ADVANTAGE of five?

>>13
You'd think an army of pissed of scientists would be a powerful enemy, but they're no match for a bunch of starfish.  The Gordon Freemans of this world are few and far between, I guess.