Thresher Shark
Alopias vulpinus
Also known as: Common Thresher; Sea Fox
Size & Weight
Average Length
135.6"
Max Length
226.0"
Average Weight
100.0 lbs
Max Weight
767.0 lbs
Lifespan
50 years
Habitat
Depth Range
0 - 1200 ft
Water Temp
60-72°F
Open ocean; offshore; pelagic; near surface
Behavior
Spawning Season
Spring-summer
Migration: Highly migratory; follow warm water and bait schools
Diet: Fish (schooling fish primary); squid - uses tail to stun prey
Fishing Tips
PNW Season
Summer offshore
Techniques: Offshore fishing; trolling; heavy tackle
Best Bait: Live mackerel; squid; trolled lures
Eating Quality
Edibility
Excellent
Firm; steaky; highly prized
State Records
California
575.0
lbs
Fun Facts
Extremely long tail (half of total length); uses tail to stun prey; excellent eating; prized game fish
How to Identify
Extremely long tail (thresher) used to stun prey; dark upper side; white belly; powerful fighter
Official Resources
Sources: CDFW; NOAA
Change History (Last updated Feb 02, 2026 at 10:33 AM)
| Date | Change | Old Value | New Value |
|---|---|---|---|
| Feb 02, 2026 10:33 AM | Updated Avg Length | — | 135.6 |