M106 (aka NGC 4258), a spiral galaxy ~ 23 million ly away has two extra spiral arms that glow in X-ray, optical and radio light. These features, or anomalous arms, are not aligned with the plane of the galaxy, but instead intersect with it.
Caldwell 33 and 34 - the large image was taken by a ground-based telescope, while the three insets are Hubble close-up views.
Galaxy NGC 3175, with its mix of bright patches of glowing gas, dark lanes of dust, bright core, and whirling, pinwheeling arms coming together, is located ~ 50 million ly away in the constellation of Antlia.
Spiral galaxy IC 2051, with its whirling, pinwheeling arms, and a bar of stars slicing through its center, lies ~ 85 million ly away in the in the southern constellation of Mensa.