Do sharks eat other sharks?
956073
yep!\nhere is a video\n\nhttp://www.youtube.com/watch?v=XErpyMTlQPI
7756
it depends on the family of the snake tat belongs 2 \nex:take python it will eat all small snakes which does not belong to python family..
504128
Sharks do have backbones, as all vertebrates. Sharks do not have true bone, but their cartilaginous skeleton can be heavily calcified so that their vertebrae have the apperance of "bone" because they look like hard white cylindric spools. You might have seen their vertebrae made into necklaces and such by artisans. \nThis is what a shark trunk vertebra looks like:\nhttp://www.marinebiodiversity.ca/shark/english/porbeagle_vertebra__copy.jpg\nAnd without the neural and haemal arches they look like this: \nhttp://homepage.mac.com/mollet/Cm/BaskingSharkImages/basking%20shark%20vertebra%204.jpg\n\nAnd these are fragments of backbones:\nhttp://www.indonetwork.info/member/77806_backbone2.jpg\n\n(Notice the white color because the cartilage is calcified.)\n\nAlmost all the cartilaginous fish have backbones made of vertebrae (i.e. both sharks and skates/rays); the exception are the chimaeras or ratfish which do not have vertebrae, but retain a notochord (the primitive condition).
20204
"Members of most [shark] species bear live young, but a few of the smaller sharks lay eggs containing much yolk and enclosed in horny shells."  See link below for full encyclopedia entry.
1109763
Ironically, sharks don't seem to much like the taste of human beings. \n\nUsually it's a case of "mistaken" identity, where they thought they were going after seals or some other aquatic food source. This is especially common when a human is paddling on a surfboard/kickboard -- the silhouette is that of a seal.\n \nMany times a shark will take a bite, then leave. Not nearly all shark attacks are fatal, often they're just long enough for the shark to decide better cuisine lies elsewhere.\n\n(Sharks in a "feeding frenzy" are a different story, where they simply attack anything within range.)\n\nI think they are terrifying simply because (1) it reminds us we are not in control as much as we think, (2) it dehumanizes us since the shark is viewing us as mere "food" rather than sentient beings with feelings, (3) the shark comes out of nowhere and could be lurking anywhere out of sight in the water, waiting to strike (at least, that's what it feels like), (4) physically we are weaker than the shark in its element, and (5) the wounds are terrible ones to suffer and/or look at, and loss of limbs and thus disability can occur.\n\nI think #2 is why people often "feel" as if sharks are evil.
1143560
they are hitchhikers of sharks....cleans the shark, eats it's leftovers, and basically live symbiotically.....
769524
Tigers are a top predator - nothing eats them while they live.  However, once they are dead, then vultures and jackels and other scavengers eat them, and also various bugs like beetles move in on the carcass, probably maggots, too....
618237
other fish, seals,people.
631008
Sharks are boneless fish, so very primitive evolutionarily-they harken back a few hundred million years, without very much change- I seriously doubt, both because they are so primitive and havent changed in so long, that they have any remaining vestigial structures.  Generally vestigial structures come from an animal that has evolved from a quite different precursor-sharks are very close to the very first fish that evolved, thus they probably havent had to shed any organs or bones that arent useful.\nRibs? How is that vestigial?  They use their ribs for structural support, just like all fish...
56757
Man-eating is reffering to humans. Sharks don't differentiate by gender. :)
177529
oarfish are very weird and interesting fish.  one species is fantastically long and skinny, up to 50 feet long (and may be the source of many stories about sea serpents).\n\nvery little is know about them, and it wasn't until a few years ago that anyone actually managed to film one alive.\n\nthey feed primarily on zooplankton, straining little copepods and other little yummies from the water.  they might also take small fish, and jellyfish when they can.\n\nlarval and juvenile oarfish are sometimes found floating near the surface, basically part of the zooplankton themselves.  they probably don't have much interaction with the adults.  the adults are solitary, and don't have much interaction with each other either.\n\nthey are probably food for any number of pelagic predators like big sharks, but that's about it for interactivity.
161088
The killer whale is so big that a shark would never be able to do any damage to it.  But at the same time a whale can't fight back.  So it would be a tie.
97580
Easy. Sharks belong within the subphylum Vertebrata.
19922
Fish eat other fish. Bigger ones eat smaller ones. In the case of a whale, notice its strainer type mouth? They take in large quantities of Crill which are very small shrimp. Others feed by sucking plankton or moss off rocks (thus cleaning). Others by snatching flying or swimming bugs off the surface.
638708
Definitely swim with the Sharks... this is my passion, thus my name.  I am trained to hand feed sharks and it is a rush.  I have found sharks to be like big puppies, they really don't want to eat us, we are too bony and I guess we must not taste too good.  \n\nI have spent many hours under with all species of sharks and there are only about 5 species that I will not swim in open water with.\n\nStatistics show that more people are killed by pigs each year than sharks
961311
Basking sharks and whale sharks are fish that eat plankton that a killer whale may try to eat. Killer whales eat gray whales, minke whales, blue whales, and sperm whales but they are all mammals and not fish.
39258
No. In fact their pharyngeal area has gill slits and is very different from the throat of tetrapods (terrestrial vertebrates). \nSo sharks can't roar, whatever the movies say :P