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Spiny Dogfish - Wikipedia, The Free Encyclopedia
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.
https://en.wikipedia.org/wiki/Spiny_dogfish
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ADW: Spiny Dogfish - Squalus acanthias
The spiny dogfish can be recognized by its two dorsal fins, each with a spine; second dorsal is smaller than the first. Pectoral fins posses curved margins and rounded free rear tips.
http://animaldiversity.org/accounts/Squalus_acanthias/
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Spiny Dogfish (Squalus Acanthias) - A-Z Animals
General information and taxonomy from A-Z Animals
http://a-z-animals.com/animals/spiny-dogfish/
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Spiny Dogfish - Squalus acanthias - ARKive
Learn more about the Spiny dogfish - with amazing Spiny dogfish photos and facts on ARKive
http://www.arkive.org/spiny-dogfish/squalus-acanthias/
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Piked Dogfishes, Squalus acanthias - MarineBio
Find out what's known about Piked Dogfishes, Squalus acanthias, Elasmobranchii, Squaliformes, Squalidae, including their world range and habitats, feeding behaviors, life history, ecology, reproduction, and conservation status.
http://marinebio.org/species.asp?id=97
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Spiny Dogfish - Squalus acanthias - Elasmodiver
Long, flattened, pointed snout. Grey to brown above usually with small white spots. White spots may follow lateral line. Eyes large. Mildly venomous spines on first and second dorsal fins. Anal fin absent. Belly white.
http://www.elasmodiver.com/spiny_dogfish.htm
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FLMNH Ichthyology Department: Spiny Dogfish
Florida Museum of Natural History Ichthyology Department. This page contains educational sections about the biology, ecology and conservation of the Spiny Dogfish.
http://www.flmnh.ufl.edu/fish/discover/species-profiles/squalus-acanthias
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Spiny Dogfish - Elasmo-Research
Smallish, dirt-common, and sometimes highly destructive to human interests, the Spiny Dogfish (Squalus acanthias) is often unfairly dismissed as the underwater equivalent of a rat.
http://www.elasmo-research.org/education/ecology/rocky-spiny_dog.htm
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Spiny Dogfish Shark (Squalus acanthias) - Conservation Institute
Information regarding the spiny dogfish shark and its conservation
http://www.conservationinstitute.org/spiny-dogfish-shark-squalus-acanthias
