Sevengill Shark
Notorynchus cepedianus
Also known as: Broadnose Sevengill; Cowshark
Size & Weight
Average Length
70.8"
Max Length
118.0"
Average Weight
50.0 lbs
Max Weight
350.0 lbs
Lifespan
49 years
Habitat
Depth Range
0 - 450 ft
Water Temp
50-60°F
Bays; estuaries; kelp beds; rocky reefs; shallow to moderate
Behavior
Spawning Season
Spring-fall mating
Migration: Seasonal movements; use SF Bay as nursery
Diet: Fish; rays; smaller sharks; seals; carrion
Fishing Tips
PNW Season
Year-round; best summer-fall
Techniques: Heavy tackle; surf/bay fishing
Best Bait: Oily fish; cut bait; salmon heads
Eating Quality
Edibility
Fair
Must process properly; strong flavor
State Records
Washington
220.0
lbs
California
276.0
lbs
Fun Facts
Seven gill slits (most sharks have 5); apex predator; aggressive; SF Bay important nursery
How to Identify
Seven gill slits (unique in Pacific); large hammer-shaped head; dark gray coloring; deep water
Official Resources
Sources: CDFW; WDFW
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 | — | 70.8 |