"the absence of recent records give cause to suspect a decline of at least 80% in the past 25 years. "

The exact number of hammerhead sharks found around the world isn’t fully known. Since they are often so deep below the surface of the water it is hard to get an exact count.

How many are alive?

Biotic Factors

Abiotic Factors

❁ Mating aggregations are predictable in both time and space allowing fishers to catch many at a time.

❁ Their large fins are valuable in the global shark fin soup trade.

❁Stress reaction leads to high bycatch mortality. 90% of hammer heads are estimated to not survive the capture.