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Spiny Dogfish

The spiny dogfish is a small, torpedo-shaped shark found in coastal waters around the world. This shark has a long, pointed snout and sharp teeth, and can be identified by its two long spines on the back of its head. Although spiny dogfish are not considered dangerous to humans, they are thought to be responsible for a number of unprovoked attacks each year. These sharks are commercially important fish, and are used in a variety of food products.

Spiny Dogfish
Spiny Dogfish

Spiny Dogfish Description

Spiny dogfish are a small type of shark that get their name from the two spines located near their dorsal fins. They are found in waters all over the world, and tend to live in deep, offshore habitats. Spiny dogfish are relatively small sharks, with an average length of 3-4 feet. They have a dark gray or brownish colored back, and a white underside. One of the most distinctive features of spiny dogfish is the two large venomous spines located near the front of their dorsal fins. These spines can deliver a painful sting, and can even be fatal if they puncture a major artery. Spiny dogfish are relatively harmless to humans, and are not known to attack people unprovoked. However, their numbers have declined sharply in recent years due to overfishing. As a result, spiny dogfish are now considered to be an endangered species.

Spiny Dogfish Habitat

Spiny dogfish are found in all temperate and subtropical oceans of the world. In North America, they are commonly found in the western Atlantic from Newfoundland to North Carolina, and in the eastern Pacific from Alaska to California. Spiny dogfish are bottom dwelling sharks that prefer waters with a depth of 60 to 3,000 feet (18-915 m). They are often found near kelp beds, rocky reefs, and shipwrecks. Spiny dogfish are viviparous, meaning they give birth to live young. Females give birth to 2-15 pups every other year. The pups are born fully developed and measure between 9 and 12 inches (22-30 cm) long at birth. Spiny dogfish grow slowly and can live up to 100 years. males reach maturity at 7-10 years old and females at 15-20 years old. Spiny dogfish are predators that feed on bony fish, squid, crabs, shrimp, and small sharks. They have sharp teeth that protrude from their mouths even when their mouths are closed.

Spiny Dogfish Diet

Spiny dogfish are small, slim sharks that get their name from the two long, sharp spines in front of each of their dorsal fins. These predators are found in temperate seas all over the world, and they prey on a wide variety of fish and invertebrates. Smaller spiny dogfish often eat squid, crabs, and shrimp, while larger individuals primarily feed on bony fishes. Spiny dogfish are opportunistic feeders and will also consume carrion if they come across it. In general, these sharks consume around 3% of their body weight each day. Given their small size, this amounts to a relatively small amount of food. Spiny dogfish have been known to live for over 40 years in the wild, though their typical lifespan is closer to 20 years.

Spiny Dogfish Size

Spiny dogfish are small, carnivorous sharks that can grow to a length of about 3 feet. They get their name from the sharp, spiny dorsal fins that protrude from their backs. Spiny dogfish are found in all major oceans and tend to inhabit deep waters near the bottom. One of the most distinctive features of spiny dogfish is their size. Males and females reach sexual maturity at different sizes, with males typically reaching a length of 2.5 feet and females reaching a length of 3.3 feet. This size difference is thought to be due to the fact that males need to be smaller in order to mate with the larger females. Spiny dogfish are also relatively long-lived, with a lifespan of up to 40 years. In spite of their small size, spiny dogfish play an important role in the marine ecosystem. They are a major predator of smaller fish, squid, and crustaceans, and help to keep these populations in check. Spiny dogfish are also an important food source for larger predators such as whales and seals. As a result, they play an important role in maintaining the balance of the marine ecosystem.

Spiny Dogfish Image
Spiny Dogfish Image

Spiny Dogfish Lifespan

Spiny dogfish have a lifespan of up to 25 years in the wild. However, they grow slowly and only reach maturity after about 10 years. Females live longer than males on average, and fish from colder waters tend to have a longer lifespan than those from warmer waters. Spiny dogfish are relatively long-lived compared to other species of fish, and this is thought to be due to their slow growth rate and low reproductive potential. Nevertheless, human activities such as overfishing and bycatch are still having a significant impact on spiny dogfish populations worldwide. As a result, the average lifespan of these fish is likely to decrease in the future unless conservation measures are put in place.

Spiny Dogfish Behavior

Spiny dogfish are a type of sharks that are known for their long, sharp spines. These spines are used to defend themselves from predators, and they also help the dogfish to catch prey. Spiny dogfish typically hunt in large schools, using their acute sense of smell to locate food. Once they have found their prey, they use their spines to slash at it, paralyzing it with their venom. The dogfish then swallows the prey whole. Spiny dogfish are not considered to be a threat to humans, but their sharp spines can cause painful puncture wounds.

Spiny Dogfish Speed

Spiny Dogfish are one of the fastest sharks in the ocean, capable of reaching speeds of up to 40 miles per hour. This amazing speed is made possible by their streamlined bodies and powerful tail fin. Their name comes from the sharp spines that line their backs, which they use to deter predators. Spiny Dogfish are found in all oceans around the world, and typically grow to be about 2-3 feet long. Although they are not considered a threat to humans, their size and speed make them a formidable predator of smaller fish and invertebrates.

Spiny Dogfish Hunting

Spiny dogfish hunting is a popular pastime in many parts of the world. The Spiny Dogfish is a small, predatory fish that is found in tropical and temperate waters. They are commonly hunted for their meat, which is considered to be a delicacy in many cultures. In addition to being eaten, Spiny Dogfish are also used for their oil, which is used in cosmetics and pharmaceuticals. Spiny Dogfish hunting typically occurs during the summer months, when the fish are most active. The best time to hunt them is early in the morning or late in the evening, when they are feeding near the surface of the water. Spiny Dogfish are notoriously difficult to catch, but experienced hunters can use a variety of techniques to improve their chances of success.


The spiny dogfish, a member of the shark family, is found in coastal waters all over the world. This fish has a long body and can grow up to six feet long. It has small eyes and two dorsal fins that run almost the entire length of its back. The spiny dogfish is brown or gray on top with a white underside. These sharks are predators and eat mostly fish but will also consume crustaceans, mollusks, and other invertebrates. They can be caught using commercial fishing gear such as trawls and gillnets but are also sometimes taken as bycatch. Spiny dogfish have been fished commercially for their meat and skin since at least the 1800s.

Frequently Asked Question


The spiny dogfish (Squalus acanthias), also called the piked dogfish, rough shark, or dog crab, is one of the best-known species of Squalus, a genus in the family Squalidae. It is found in subtropical and temperate waters worldwide. It is largely an apex predator preying on fish, squid and crabs.


The spiny dogfish shark is a predatory shark that feeds mainly on small bony fish and cephalopods. It hunts for prey by stealthily swimming through the water with its dorsal fin sticking out of the surface, occasionally giving short bursts of speed to surprise its unsuspecting prey. When it spots something edible, it quickly attacks with a sharp burst of speed, bites its victim hard to immobilize it, and then swallows it whole.


The spiny dogfish is a small shark that can reach up to 3.3 feet in length and weigh up to 55 pounds. They are unique in that they possess spines along their dorsal fins. These spines are used defensively to ward off predators. Spiny dogfish sharks are found in coastal waters in the North Atlantic and North Pacific oceans. They are a bottom-dwelling shark and feed on small fish, shrimp, and squid. They are ovoviviparous, meaning that the eggs hatch inside the female’s body and the young sharks are born live.


Spiny dogfish sharks are not considered to be dangerous to humans. These small Coastal sharks feed mainly on bony fishes and invertebrates, and have been known to nibble on the odd spear fisherman! While they have been known to attack people, they are not considered a serious threat. The majority of encounters have been characterized by the dogfish chasing and nipping at catch or swimmers. Such attacks are usually non-fatal and result in only minor injuries.


If you encounter a Spiny Dogfish in the wild, you should take care to avoid its spine. The Spiny Dogfish is a small, Sharks with two dorsal (back) fins and tiny, sharp teeth. They get their name form the fact that they have a very sharp spine located just behind each of their dorsal fins. This spike is used for both defense and to puncture their prey. While an encounter with a Spiny Dogfish is unlikely to be fatal, it could still cause serious injury if you’re not careful. If you must handle one, be sure to grip it firmly behind the head to avoid being punctured by the spine.


The International Union for Conservation of Nature and Natural Resources (IUCN) has classified the spiny dogfish as “vulnerable.” This classification is based on a variety of factors, including declining population numbers and habitat loss. There are an estimated 16 million spiny dogfish in the world, with a majority of them living in temperate waters. However, their population has been declining in recent years due to overfishing and bycatch. They are often caught as bycatch in fisheries targeting other species, such as tuna and swordfish. In addition, their habitats are being lost or degraded due to coastal development and pollution.
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