The wood you is called "Spalted", another indicator such as Quilted,
Curly, Birds Eye and Tiger.
Spalted wood has discolorations from minerals and other intrusions into
the wood. I can't beleiev you'll be able to bleach the splating away
and have any wood left. This is much more common in soft Maple as
opposed to hard (hard Rock or Sugar) Maple.
Quilted is a beatufil figue in the wood that looks like little pillows.
Iyt is a bit less evident on the raw wood but with the right finish it
can be stunning and look as if someone has place a piece of glass over
an actuall pillowy wood.
Curly is really a forerunner to quilted. It has curly grain lines that
go squiggle around. when it is lots of closed bubble looking forms that
is what causes the quilted look.
Birds Eye, is curly Maple with lots of little black dots, the size of a
bird's eye. I think this is caused by a burl type effect of you've seen
the little nubs on a burl where all the suckers are shooting out.
Tiger has striped figure, like on a Tiger.
Lots o' different woods have these types of figure with the possible
exception Birds Eye, maybe some can correct me but I've only ever seen
Bird's Eye in Maple.