Introduction
The Thresher Shark, also referred to as Alopias, is a distinctive species of sharks belonging to the family Alopiidae. They get their name from their unique, elongated caudal fins, which make for about half of their total length and are used to whip their prey.
Conservation Status
Thresher sharks are currently listed as Vulnerable on the International Union for Conservation of Nature’s (IUCN) Red List. Efforts for their conservation revolve around implementing stricter fishing regulations, increased monitoring of their populations and promoting awareness of their vulnerable status.
Statistics
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| Statistic | Average | Range |
|---|---|---|
| Length | 16 feet | 10-20 feet |
| Weight | 500 lbs | 200-750 lbs |
| Average Lifespan | 20-50 years | |
| Max. Depth Range | 500 meters |
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Distribution
These sharks are globetrotters, they inhabit the Atlantic, Indian, and Pacific Oceans. Every year, they undergo large-scale migrations towards equatorial waters during the winter and towards polar waters in the summer.
Habitats
Thresher sharks are pelagic creatures preferring warm, offshore waters. They can often be found at a depth range of 0 to 500 meters. They are comfortable in water temperatures ranging from 10 to 20 degrees Celsius.
When and Where to See
Thresher sharks are most active during dawn and dusk. They migrate to warmer equatorial waters during the winter season and to cooler polar waters during summer.
Best Fishing Locations
Some of the best places where you can find thresher sharks include:
- Southern California, USA
- Baja California, Mexico
- South Australia
- Japan
- Philippines
- Indonesia
- Sri Lanka
- Canada
- South Africa
- Italy
Fishing Tips
Look for warm, offshore waters. Thresher Sharks are often found near the surface during early mornings and late evenings.
How to Catch
Live or cut bait such as mackerel, squid, or anchovies can be effective in attracting Thresher Sharks. Experienced anglers employ trolling or drift fishing techniques to catch them.
Identification Guide
Thresher Sharks are known for their large caudal fins which almost match the length of the rest of their body. They have a small mouth, large eyes and a short snout. Their bodies are predominantly grey with lighter underbellies.
Culinary Uses
Thresher shark meat is lean and mildly flavored. Due to its firm texture, it’s great for grilling, broiling or baking. Moreover, the meat is rich in protein, vitamins and minerals, making it a healthy food choice.
Additional Information
Thresher sharks are known for their unique method of hunting, where they use their long tail to stun fish before eating them. Main threats to this species include overfishing and bycatch.
References and Further Reading
“Sharks of the World” by Leonard Compagno, available on Amazon here.
The Florida Museum’s information page on Thresher Sharks can be found here.
BBC Earth’s brief documentary on the hunting of Thresher Sharks can be viewed on YouTube here