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Some shark species complete gestation in under 12 months, highlighting how extreme this timeline may be.
Although direct observation is rare, reproductive modeling based on related sleeper sharks suggests Greenland sharks may experience gestation periods lasting multiple years, potentially exceeding those of any known shark species.
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💥 Impact (click to read)
If confirmed, that would mean a female invests years into a single reproductive cycle after waiting more than a century to mature, stretching one birth event across a timeframe longer than many human careers.
Such extreme reproductive pacing magnifies conservation risk, because population recovery operates on biological clocks measured not in decades but in generations spanning centuries.
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