The spiny dogfish, spurdog, mud shark, or piked dogfish, Squalus acanthias, is one of the best known species of the Squalidae (dogfish) family of sharks, which is part of the Squaliformes order. While these common names may apply to several species, Squalus acanthias is distinguished by having two spines (one anterior to each dorsal fin) and lacks an anal fin. It is found mostly in shallow waters and further offshore in most parts of the world, especially in temperate waters.
Morphology and behavior
The spiny dogfish has dorsal spines, no anal fin, and white spots along its back. The caudal fin has asymmetrical lobes, forming a heterocercal tail.
The species name acanthias refers to the shark's two spines. These are used defensively. If captured, the shark can arch its back to pierce its captor. Glands at the base of the spines secrete a mild venom.
Males mature at around 11 years of age, growing to 80–100cm (2.6–3.3ft) in length; females mature in 18–21 years and are slightly larger than males, reaching 98.5–159cm (3.23–5.22ft). Both sexes are greyish brown in color and are countershaded. Males are identified by a pair of pelvic fins modified as sperm-transfer organs, or "claspers". The male inserts one clasper into the female cloaca during copulation.
The options in the DraftAddendum aim to establish equivalent overnight soak restrictions for spiny dogfish harvesters in state waters that do not possess a federal spiny dogfish permit.
Mantoloking has rebuilt after SuperstormSandy...Fish Monger II Capt ... Shell E ... A few of the tackle shops in the Ocean County locales had reported that a bunch of dogfish invaded the surf. The spiny creatures have been attacking the hook baits ... Capt.
NOAA Fisheries is issuing a temporary rule to extend the 2024 spiny dogfish specifications emergency rule, with an adjustment to account for an annual catch limit (ACL) overage in fishing year 2023.
Pet Sounds... What is sonar? ... Source. NOAA. Advertisement ... The Beach Boys in London, 1964 ... As opportunistic feeders, elephant seals are believed to feed on bottom-dwelling marine animals such as ratfish, swell sharks, spiny dogfish, eels, rockfish and squid.
Watch... They're lurking in the water ... Dogfish shark. There are two varieties of the Dogfish shark – smooth and spiny. Spiny Dogfish can grow up to four feet and have two dorsal fins with ungrooved large spines. Smooth Dogfish sharks can grow to five feet.
There’s a new pair of apex predators in Puget Sound... What brought them to these waters? Have some of them been here all along? Could climate change be a factor? ... Spiny dogfish and sixgill sharks are well documented throughout the waters ... ___ ... ....
There’s a new pair of apex predators in Puget Sound... What brought them to these waters? Have some of them been here all along? Could climate change be a factor? ... Spiny dogfish and sixgill sharks are well documented throughout the waters ... .
An alarming increase of sharks in the East Coast waters has beachgoers and fishermen on edge ... the spiny dogfish, the smooth dogfish, the dusky shark, the brown shark and the sand tiger shark ... 'Some people might not think it's a good ... .
the spiny dogfish, the smooth dogfish, the dusky shark, the brown shark and the sand tiger shark. 5 ... 5 ... wtnh ... Doctor to Gen X ... 5 ... wtnh ... 5 ... He added that smooth dogfish are also currently present, but will move out when the water cools in the fall and winter.
Spiny dogfish ... A relatively small shark, the Atlantic spiny dogfish grows up to 4 feet long, with a slim, gray body sporting distinct white spots ... Spiny dogfish are also often consumed by people.
... long thin teeth while smooth dogfish do not. The spiny dogfish is another small coastal shark, but can easily be distinguished from a sand tiger by its two dorsal fin spines and the lack of anal fin.
Sharks have gradually begun to appear as our inshore and offshore waters warm up. Thus far, most of the catches for rod-and-reel anglers have involved blue, mako, and a few threshers. ... This rule does not apply to smooth dogfish and spiny dogfish.
All prohibited sharks must be immediately released, according to the new regulations. Sport fishing enthusiasts must keep any shark not being taken in the water with its gills submerged, with the exception of smooth and spiny dogfish ...Shark protection.
