An extinct genus of prehistoric shark or fish-like creature from the Paleozoic era, characterized by distinctive comb-like tooth structures.
From Greek 'kteis' (comb), 'akantha' (thorn/spine), and the Latinized suffix '-us,' literally meaning 'comb-thorn' and referring to the fish's distinctive spiny dentition.
Ctenacanthus is a perfect example of how paleontologists name fossils based on their most distinctive feature—ancient sharks with weird comb-like teeth got a name that literally describes exactly what you're looking at.
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