Riddle......... What am I?

[OneStepTango]

Well, it's something that is one of eight, like the tentacles of an octopus.

 

[Blue Wolf]

A riddle posed that's got me stumped:

We fight the good fight for the one over all, all greater than me but yet all so small.
For though I am one I am eight with my friends, and we go where we like when we come to our ends.
But we must choose from seven others who are also our brothers and then we do better ours peers, what am I?

 

[Woogie]

spider's legs?

 

[Paul]

spiders legs? no idea, interesting though

Edit: Are the last few words correct? doesn't seem to make sense...

 

[Frog in Progress]

Umm,a banana? I have no idea.

 

[Mark]

You are a pawn in a chess game

 

[Roger]

You could be a Finger. But not sure if all the clues fit.