What best describes the predatory style of Xenacanthus in stagnant waters?
Answer
Opportunistic forager.
Given its relatively modest size, eel-like profile, and bottom-dwelling nature within slow-moving or stagnant freshwater environments, Xenacanthus adopted a feeding strategy focused on efficiency. It functioned more like an opportunistic forager, sifting through sediment or ambushing prey that hid near the substrate, rather than engaging in energy-intensive pursuit of fast-swimming fish in open water. This meant prioritizing prey that was readily available in its specific ecological setting, optimizing energy use in challenging water conditions.

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