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Shark

shark

1. (Science: zoology) Any one of numerous species of elasmobranch fishes of the order plagiostomi, found in all seas.

Some sharks, as the basking shark and the whale shark, grow to an enormous size, the former becoming forty feet or more, and the latter sixty feet or more, in length. most of them are harmless to man, but some are exceedingly voracious. The man-eating sharks mostly belong to the genera Carcharhinus, Carcharodon, and related genera. They have several rows of large sharp teeth with serrated edges, as the great white shark (Carcharodon carcharias, or Rondeleti) of tropical seas, and the great blue shark (Carcharhinus glaucus) of all tropical and temperate seas. The former sometimes becomes thirty-six feet long, and is the most voracious and dangerous species known. The rare man-eating shark of the united states coast (Charcarodon Atwoodi) is thought by some to be a variety, or the young, of C. Carcharias. The dusky shark (Carcharhinus obscurus), and the smaller blue shark (C. Caudatus), both common species on the coast of the United States, are of moderate size and not dangerous. They feed on shellfish and bottom fishes.

2. A rapacious, artful person; a sharper.

3. Trickery; fraud; petty rapine; as, to live upon the shark. Baskin shark, liver shark, nurse shark, oil shark, sand shark, tiger shark, etc. See Basking, Liver, etc. See also dogfish, houndfish, notidanian, and tope. Gray shark, the sand shark. Hammer-headed shark 87e . See hammerhead. Port Jackson shark. See Cestraciont. Shark barrow, the eggcase of a shark; a sea purse. Shark ray. Same as angel fish, under angel. Thrasher shark, or thresher shark, a large, voracious shark. See Thrasher. Whale shark, a huge harmless shark (Rhinodon typicus) of the indian ocean. It becomes sixty feet or more in length, but has very small teeth.

Origin: Of uncertain origin; perhaps through OF. Fr. Carcharus a kind of dogfish, Gr, so called from its sharp teeth, fr. Having sharp or jagged teeth; or perhaps named from its rapacity (cf. Shark, &i); cf. Corn. Scarceas.


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Which animal does this tooth belong to?

Yes it looks like a shark tooth, a ripping/ tearing tooth, not a tooth of a herbivorous animal. It is not from the ancient megalodon I don't think as no serrations . It does not look as though it has completely fossilized. It could ...

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by vk4vfx
Wed Nov 20, 2013 9:28 am
 
Forum: Zoology Discussion
Topic: Which animal does this tooth belong to?
Replies: 2
Views: 1706

Re: Which animal does this tooth belong to?

It looks like a sharks tooth. Is it flattened with two sharp edges? It looks to be. What a shark was doing on top of a mountain is a bit of a mystery, but then things found in glaciers tend to be thousands of years old and still very ...

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by animartco
Mon Aug 05, 2013 11:33 am
 
Forum: Zoology Discussion
Topic: Which animal does this tooth belong to?
Replies: 2
Views: 1706

Alien facehugger biology

... way for the facehugger to fit in the reproductifve cycle of the Xenomorph? The 'living egg' is in my opinion explainable as something like a shark egg, with tentacles grabbing something to hold onto (except for the opening 'mouth' thing on top) Same goes for the Embryo/Chestburster, that ...

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by jkootte
Wed Nov 30, 2011 4:31 pm
 
Forum: General Discussion
Topic: Alien facehugger biology
Replies: 2
Views: 1606

Sharks name ??

Angular Angel Shark has the Latin name Squatina Guggenheim, what do you think about this?)

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by Blacky11
Mon Aug 01, 2011 10:17 am
 
Forum: Zoology Discussion
Topic: Sharks name ??
Replies: 6
Views: 5350

how is pollination an example of mutualism?

... only. Symbiosis describe a relation between two interspecies individual, not just an event. Some syimbiosis just happen to appear in a event: like shark and that little fish attaching their body (forgot the name) to the shark. The little ones gain some food from shark skin (i m not sure whether ...

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by adihutama
Fri Mar 11, 2011 8:37 am
 
Forum: Ecology
Topic: how is pollination an example of mutualism?
Replies: 8
Views: 14682
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