Assertion: bull shark's fin | /r/HasProperty | the eugeneodontida
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Source sentences:
text: Strange species of sharks like the Stethacanthus, a shark like a flat anvil-like, spiky fin, the Eugeneodontida, a shark with a tooth whorl at the end of their bottom jaw, and the Falcatus, nickname the unicorn shark, grew a long, sharp horn on it