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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.piny dogfish are fished for food in Europe, the United States, Canada, New Zealand and Chile. The meat is primarily consumed in England, France, the Benelux countries and Germany.
Description. The spiny dogfish is one of the most abundant demersal shark species in Atlantic Canada and may be the most abundant shark species worldwide. This shark is a major predator on several commercially significant species such as herring, Atlantic mackerel and squid.s a very long-lived, slow-growing and late to mature shark, spiny dogfish are particularly vulnerable to fishing and slow to recover from over-exploitation. The major threat to this species in Atlantic Canada is bycatch.