Looks like a moulding defect to me; resin starvation at those tow interfaces. The white areas are likely a result of the laquer coat - milky white where it's thicker, clear where it's thinner.
If you bought it like that, I hope you didn't pay full pop.
On the cautious end of the spectrum...
Hey Allcomposites,
I'm no NDI expert either but interact with the group every day. In my work with commercial aero T-stringers, radius filler areas (or noodles) are exempt from inclusion or porosity detection requirements.
I don't know of a method to inspect with ultrasonics as the geometry...
