When the proportion of calcium carbonate in the blue mud is considerable there results a calcareous ooze, which when found on the continental slope and in enclosed seas is largely composed of remains of deep-sea corals and bottom-living foraminif era, pelagic organisms including pteropods being less frequently represented.
The deep-sea fishery attracts hundreds of boats from the north of Scotland, and most of the catch is cured for the English, German and Dutch markets.
Sigsbee, Deep-sea Sounding and Dredging (Washington, 1880); O.
The deep-sea fishing industry of the town is important, the fishing fleet in 1902 numbering 67 vessels.
The chief industries include coast and deep-sea fisheries, shipbuilding, tanning, the making of cod-liver oil and fish-curing.
The deep-sea and coast fisheries of Ireland form a valuable national asset, which still admits of much development and improvement despite the fact that a considerable number of acts of parliament have been passed to promote and foster the fishing industry.
Bounties to encourage deep-sea fishing have been given by the federal government since 1882.
All the older subdivisions are represented, the deposits having the characters of a deep-sea formation in the Aral-Caspian region and on the Caucasus.
The Auronectae are peculiar deep-sea forms, little known except from Haeckel's descriptions, in which the large pneumatophore has a peculiar duct, termed the aurophore, placed on its lower side in the midst of a circle of swimming-bells.
All deep-sea measurements are subject to uncertainty because the sounding machine merely measures the length of wire which runs out before the lead touches bottom, and this agrees with the depth only when the wire is perpendicular throughout its run.