Sharks are a group of fish characterized by a cartilaginous skeleton, five to seven
gill slits on ..... Unlike bony fish, sharks do not have gas-filled swim bladders for
buoyancy. ..... Species that...
Shark sleeping patterns have puzzled scientists for many years. All sharks extract
oxygen from the water with their gills, and to do this water must move over and ...
In response to a question about whether or not sharks sleep and, if they do, how
do they swim while unconscious, I wrote: Sleep is one of the last bastions of ...
Jul 7, 2015 ... Sharks and their sleeping habits are still very much a mystery, mainly because of
the challenge of monitoring sharks for a 24-hour period, ...
www.ask.com/youtube?q=Do Sharks Sleep?&v=_fnjgF9K_YE
Mar 18, 2011 ... 2 White Tip Sharks hanging out in a cave while a cleaner wrasse does its job!
Who knew sharks could just sit?
Mar 25, 2012 ... My friend was saying that shark never sleeps. Because to keep it afloat, it has to
continuously swim, so that it can't sleep. This claim is repeated ...
Sharks - Sleep. Image of a Whitetip reef shark - Triaenodon obesus - laying on
the sea floor in. Whitetip reef shark - Triaenodon obesus - laying on the sea floor
Jan 9, 2014 ... Humans love to crash on the coach every day, but sharks don't. Some sharks, like
the pelagic species, just have to keep swimming. For them ...
Sharks do sleep, but they do so with their eyes open. Only one side of the brain
sleeps at a time so that they are able to continue the cycle of taking in air as they
Sharks rest in an approximation of what is termed sleep in land animals, though
they do it with their eyes open. However, some sharks are nocturnal, which ...