Aspects of Deep Sea Biology

abundant adult amphipods arrow-worms bathypelagic Beebe biology bottom waters Brauer brotulids catch cells cephalopods ceratioid Chauliodus sloani coccolithophores Copenhagen copepods creatures crustaceans Cyclothone Dana-Rep deep ocean deep scattering layers deep waters deep-sea fishes deep-sea floor deep-water deeper depths developed diatoms distribution dredging echo-sounding environment euphausiids Expedition eyes fauna feed female float gelatinous genus gland Gonostoma gonostomatids hatchet-fishes hauls Hjort inches long invertebrates lantern-fishes larvae lateral line lateral line organs length levels light organs living space luminescent luminous macrourids male marine Mediterranean metres Michael Sars Murray muscles Myctophidae Myctophum North Atlantic number of species oceanic waters oozes oxygen Pacific pattern pelagic peridinians photophores plankton planktonic animals plants Plate prawns prey pteropods Radiolaria region retina salps sea water siphonophores sound spawning squid stomach Stomias stomiatoid fishes subtropical surface waters swim swim-bladder temperature tissue towed trawl tropical underwater upper vertical water masses