Id on wormish thing

[RCBrooke]

Sorry can't do a pic.

Just found a 1 1/4" wormy type thing.

Description:
1 1/4"
white semi flat body
100 plus red legs? on the sides except 1/4" on the head
black on sides of head
legs move in wave pattern
swims about a foot a sec (really fast)
vein(?) in white body shows a pulse of red (blood?) moving from tail to head.

Any thoughts?

Randy

 

[jasontg99]

Bristleworm?

 

[RCBrooke]

Oh, and approx.
1/8" wide round head tapers to 1/4" wide body tapering to a point on the tail.