Aspects of Deep Sea Biology

abundant adult Antarctic Argyropelecus arrow-worms bathypelagic Beebe Bermuda biology body 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 depths developed diatoms distribution dredging echo-sounding environment euphausiids Expedition eyes fauna feeding 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 Mediterranean metres Michael Sars mid-water migrations Murray muscles Myctophidae Myctophum nets North Atlantic number of species oozes oxygen pattern pelagic peridinians photophores plankton planktonic animals plants prawns prey pteropods Radiolaria rat-tails 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