Pacific Spiny Dogfish
Pacific Spiny Dogfish
Squalus suckleyi
Also Known As
Dogfish, Spring dogfish, Spiked dogfish, Grayfish, Spur dog, Piked dogfish
Quick Facts
Region
Alaska,
West Coast
Spiny dogfish. Credit: National Ocean Service
Spiny dogfish. Credit: National Ocean Service
About the Species
U.S. wild-caught Pacific spiny dogfish is a smart seafood choice because it is sustainably managed and responsibly harvested under U.S. regulations.
Population
The Pacific Coast stock is not overfished.
Fishing Rate
Not subject to overfishing.
Habitat Impacts
Fishermen generally do not directly target spiny dogfish in waters off the Pacific Coast and Alaska. As a result, there are no habitat impacts from a directed fishery.
Bycatch
Fishermen generally do not directly target spiny dogfish in waters off the Pacific Coast and Alaska. As a result, there are no bycatch impacts from a directed fishery.
Population Status
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There are three stocks of Pacific spiny dogfish: Pacific coast, one stock contained in the Bering Sea/Aleutian Islands Shark Complex, and one stock contained in the Gulf of Alaska Shark Complex. According to the most recent stock assessments:
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The Pacific coast stock is not overfished (2021 stock assessment), and not subject to overfishing based on 2020 catch data. Summary stock assessment information can be found on Stock SMART.
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The Pacific spiny dogfish stock is managed as part of the Bering Sea / Aleutian Islands Shark Complex and has been assessed, but there is not enough information to determine the population size so the overfished status is unknown (2016 stock assessment). This complex is not subject to overfishing based on 2021 catch data. Summary stock assessment information can be found on Stock SMART.
-
The Pacific spiny dogfish stock is managed as part of the Gulf of Alaska Shark Complex and has been assessed, but there is not enough information to determine the population size so the overfished status is unknown (2020 stock assessment). This complex is not subject to overfishing based on 2021 catch data. Summary stock assessment information can be found on Stock SMART.
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Appearance
- Spiny dogfish are slim with a narrow, pointed snout and distinctive white spots.
- Their bodies are gray above and white below.
- True to their name, they have sharp spines in front of each of their two dorsal fins.
Biology
- Spiny dogfish live a long time, sometimes more than 80 years.
- They grow slowly, up to more than 4 feet and 22 pounds, although adults are generally 2½ to 3½ feet long.
- Spiny dogfish aren’t able to reproduce until they’re older – females mature at an average age of 35, males mature at an average age of 19.
- Female spiny dogfish are internally fertilized, and pups are retained in utero for 18 to 22 months. Depending on their size, female spiny dogfish can have up to 22 pups each reproductive cycle.
- Females generally release their young during the fall in shallow bays.
- The newborn pups range in length from 8½ to 12 inches.
- Spiny dogfish are opportunistic feeders, eating whatever prey is available. They mainly eat small, schooling pelagic fish such as herring, and small invertebrates such as shrimp, crab, and squid.
- They are preyed upon by larger species of shark, including larger spiny dogfish, and by larger fishes (such as cod and hake), seals, and killer whales.
Where They Live
Range
- Pacific spiny dogfish are found from the Bering Sea to Baja California.
- They are more common off the U.S. West Coast and British Columbia than in the Gulf of Alaska or the Bering Sea and Aleutian Islands region.
Habitat
- Spiny dogfish live in waters as deep as 4,050 feet but most are found in waters less than 1,150 feet deep.
- They are common in inland seas, such as San Francisco Bay and Puget Sound, and in shallow bays from Alaska to central California.
- They exhibit a variety of seasonal and daily movement patterns. Some animals migrate to warmer waters in winter, while others stay in colder waters. They tend to move shallower during the day and deeper at night.
- Males are generally found in shallower water than females, except for pregnant females that enter shallow bays to pup.
- Immature juveniles live in the water column near the surface. As they grow older, they settle to the bottom.
- Spiny dogfish often travel in large schools, largely to protect themselves from predators, and avidly feed during their journeys. The schools include hundreds, if not thousands, of dogfish and tend to divide up according to size and gender, although the young—both male and female—tend to stay together.
- They can travel long distances – a spiny dogfish tagged in Queen Charlotte Sound (off British Columbia) was recovered off the northeast coast of Japan years later.
Fishery Management
- NOAA Fisheries and the Pacific Fishery Management Council manage Pacific spiny dogfish on the West Coast.
- Managed under the Pacific Coast Groundfish Fishery Management Plan:
- Part of the “other fish complex” that includes all of the non-flatfish or rockfish species managed under the groundfish fishery management plan, which is not assessed.
- Managers set acceptable catch limits for the complex and limit the amount of spiny dogfish fishermen can harvest per fishing trip.
- Harvests are carefully monitored in commercial fisheries through the West Coast Observer Program and landing reports.
- Coastwide, depth-based closed areas designed to protect overfished groundfish species.
- NOAA Fisheries and the North Pacific Fishery Management Council manage Pacific spiny dogfish as part of the Gulf of Alaska Shark Complex and the Bering Sea/Aleutian Islands Shark Complex.
- Managed under the Bering Sea/Aleutian Islands Groundfish Fishery Management Plan and Gulf of Alaska Groundfish Fishery Management Plan:
- Part of the shark complexes.
- Managers set a total allowable catch for stock complexes every year, based on annual stock assessments.
- Catch limits for the complex are the sum of the recommended limits for each species in the complex.
Harvest
- In 2021, commercial landings of Pacific spiny dogfish totaled 103,000 pounds and were valued at $1,800, according to the NOAA Fisheries commercial fishing landings database.
- Spiny dogfish is a low-value species and is mostly taken as bycatch in Pacific coast–based fisheries targeting other commercially important species.
- There are currently no directed commercial fisheries for shark species in federally or state-managed waters of Alaska. Spiny dogfish are caught incidentally in fisheries for halibut and groundfish. Nearly all shark catch is discarded at sea, but some spiny dogfish are retained as incidental catch in state-managed fisheries.
- Spiny dogfish are generally not targeted by anglers off the Pacific coast or Alaska. However, due to their aggressive feeding nature, spiny dogfish tend to bite baited hooks and are incidentally caught in many recreational fisheries.
- Off the Pacific coast, spiny dogfish are considered a bottomfish so they are restricted by the recreational coastwide aggregate limit (although most are released because they’re not highly valued) as well as all other applicable bottomfish recreational restrictions (depth, season, etc.).
- In Alaska, anglers have annual bag limits for sharks of any kind.
Scientific Classification
- Pacific spiny dogfish are found from the Bering Sea to Baja California.
- They are more common off the U.S. West Coast and British Columbia than in the Gulf of Alaska or the Bering Sea and Aleutian Islands region.
- Spiny dogfish live in waters as deep as 4,050 feet but most are found in waters less than 1,150 feet deep.
- They are common in inland seas, such as San Francisco Bay and Puget Sound, and in shallow bays from Alaska to central California.
- They exhibit a variety of seasonal and daily movement patterns. Some animals migrate to warmer waters in winter, while others stay in colder waters. They tend to move shallower during the day and deeper at night.
- Males are generally found in shallower water than females, except for pregnant females that enter shallow bays to pup.
- Immature juveniles live in the water column near the surface. As they grow older, they settle to the bottom.
- Spiny dogfish often travel in large schools, largely to protect themselves from predators, and avidly feed during their journeys. The schools include hundreds, if not thousands, of dogfish and tend to divide up according to size and gender, although the young—both male and female—tend to stay together.
- They can travel long distances – a spiny dogfish tagged in Queen Charlotte Sound (off British Columbia) was recovered off the northeast coast of Japan years later.
Fishery Management
- NOAA Fisheries and the Pacific Fishery Management Council manage Pacific spiny dogfish on the West Coast.
- Managed under the Pacific Coast Groundfish Fishery Management Plan:
- Part of the “other fish complex” that includes all of the non-flatfish or rockfish species managed under the groundfish fishery management plan, which is not assessed.
- Managers set acceptable catch limits for the complex and limit the amount of spiny dogfish fishermen can harvest per fishing trip.
- Harvests are carefully monitored in commercial fisheries through the West Coast Observer Program and landing reports.
- Coastwide, depth-based closed areas designed to protect overfished groundfish species.
- NOAA Fisheries and the North Pacific Fishery Management Council manage Pacific spiny dogfish as part of the Gulf of Alaska Shark Complex and the Bering Sea/Aleutian Islands Shark Complex.
- Managed under the Bering Sea/Aleutian Islands Groundfish Fishery Management Plan and Gulf of Alaska Groundfish Fishery Management Plan:
- Part of the shark complexes.
- Managers set a total allowable catch for stock complexes every year, based on annual stock assessments.
- Catch limits for the complex are the sum of the recommended limits for each species in the complex.
Harvest
- In 2021, commercial landings of Pacific spiny dogfish totaled 103,000 pounds and were valued at $1,800, according to the NOAA Fisheries commercial fishing landings database.
- Spiny dogfish is a low-value species and is mostly taken as bycatch in Pacific coast–based fisheries targeting other commercially important species.
- There are currently no directed commercial fisheries for shark species in federally or state-managed waters of Alaska. Spiny dogfish are caught incidentally in fisheries for halibut and groundfish. Nearly all shark catch is discarded at sea, but some spiny dogfish are retained as incidental catch in state-managed fisheries.
- Spiny dogfish are generally not targeted by anglers off the Pacific coast or Alaska. However, due to their aggressive feeding nature, spiny dogfish tend to bite baited hooks and are incidentally caught in many recreational fisheries.
- Off the Pacific coast, spiny dogfish are considered a bottomfish so they are restricted by the recreational coastwide aggregate limit (although most are released because they’re not highly valued) as well as all other applicable bottomfish recreational restrictions (depth, season, etc.).
- In Alaska, anglers have annual bag limits for sharks of any kind.
Scientific Classification
| Kingdom | Animalia | Phylum | Chordata | Class | Chondrichthyes | Order | Squaliformes | Family | Squalidae | Genus | Squalus | Species | suckleyi |
|---|
Featured News
Fishermen prepare to release a Pacific sleeper shark after collecting biological measurements during an electronic monitoring survey. Credit: Keith Fuller, Alaska Pacific University.
Seafood Facts
Is Pacific Spiny Dogfish Sustainable?
U.S. wild-caught Pacific spiny dogfish is a smart seafood choice because it is sustainably managed and responsibly harvested under U.S. regulations.
Availability
Year-round.
Source
U.S. wild-caught from Alaska to California.
Taste
Sweet, mild flavor and a higher oil content than mako or other sharks.
Texture
Flaky yet firm.
Color
Raw meat is white. The outer flesh can have a reddish color, which turns brown when cooked. The rest of the meat is white when cooked.
Health Benefits
Shark is a low-fat source of protein that is high in selenium and vitamins B6 and B12. More information on health and seafood.
Nutrition Facts
Servings: 1; Serving Weight: 100 g; Calories: 130; Protein: 20.98 g; Total Fat: 4.51 g; Total Saturated Fatty Acids: 0.925 g; Carbohydrate: 0 g; Total Sugars: 0 g; Total Dietary Fiber: 0 g; Cholesterol: 51 ng; Selenium: 36.5 mcg; Sodium: 79 mgSeafood News
The scientists are using a satellite tag on the yellowfin tuna to understand the species dynamics, abundance, distribution, movement patterns, and habitat use. Credit: NOAA Fisheries
Model results showing where fish species (circles, with examples shown around perimeter) within each family or class (colors, legend on right) fall among three life-history strategies (periodic, opportunistic, and equilibrium) based on their traits. Credit: NOAA Fisheries
The Fishadelphia team. Credit: Dr. Talia Young.
