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 ...
Jan 19, 2016 ... Sharks do not experience sleep the same way humans do. Some can't sleep at
all, and the ones that do never close their eyes. Some shark ...
Sharks do not sleep like humans, but instead have restful periods. Sharks
become semi-conscious rather than fall asleep. Certain species of sharks have to
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 ...
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?
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, ...
For this reason, it was supposed for a long time that sharks did not, in fact, sleep.
However, sharks need to rest at some stage and different species accomplish ...
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 ...