Longnose spurdog
Encyclopedia
The longnose spurdog, Squalus blainville, is a dogfish shark of the genus Squalus, found over continental shelves
Continental shelf
The continental shelf is the extended perimeter of each continent and associated coastal plain. Much of the shelf was exposed during glacial periods, but is now submerged under relatively shallow seas and gulfs, and was similarly submerged during other interglacial periods. The continental margin,...

in all oceans, at depths of between 15 and 800 metres. They reach one metre in length.
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