Which direction were the prominent spines projecting along the sides of Wiwaxia angled?

Sharply toward the rear of the animal

A hallmark feature of well-preserved Wiwaxia specimens is the presence of several rows of stiff, prominent spines running along the sides of its body. These spines were consistently observed to be angled sharply backwards, projecting away from the head region toward the animal's posterior end. This distinct orientation strongly implies a primary functional role related to environmental interaction or defense. Specifically, this rearward angling would be highly effective for defending against predators approaching from the front or sides, or alternatively, it could serve an anchoring function, helping the animal brace itself stably against strong currents flowing along the seabed, preventing it from being dislodged.