Definition of bull shark
: an aggressive requiem shark (Carcharhinus leucas) of tropical to subtropical coastal waters that has a short, blunt snout and small eyes, is tolerant of freshwater and may spend extended periods in rivers, and has been known to attack people Bull sharks—believed to be the culprits in the two recent Florida attacks—are especially pugnacious and often found in shallow water. — Prakash Gandhi et al.
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