Pacific Sleeper Sharks Mature So Late That Decades Pass Before Reproduction

This giant predator may wait decades before having its first offspring.

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🤯 Did You Know (click to read)

Deep-sea sharks often produce relatively few offspring compared to many shallow-water fish species.

Like many deep-sea sharks, Pacific sleeper sharks exhibit slow growth and late maturity, meaning reproductive age may not be reached until many years into their long lifespan.

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💥 Impact (click to read)

In a species that can exceed 6 meters in length, delayed maturity means each breeding adult represents decades of survival in high-pressure, food-limited environments before contributing to the next generation.

This life-history strategy makes population recovery extremely slow, so even limited fishing pressure can have outsized impacts on a predator that appears physically unstoppable but is biologically fragile.

Source

IUCN Red List

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