What is the nastiest predatory animal for its size?
815969
The Irukandji jellyfish (Carukia barnesi) is a small, extremely venomous box jellyfish. Its bada-ss, a wonder of evolutionary genetics.\n\nIts smaller then a fingernail, with very long hair thin tentacles nearly invisible in the water. Recently discovered, we know very little because it is so fragile and almost impossible to keep alive in habitation.\n\nhttp://www.youtube.com/watch?v=XPtqVh4fcoc check out the video, I do believe this woman was sick for 2-weeks. Described as an unending staircase of pain where the most potent morphine injection barely takes the edge off! Like having your spine smashed over and over again.\n\nThat woman had a dead tentacle swipe across her wrist. After getting out of the water. she was covered head to toe in a scuba outfit. She was stung while researching this animal, being aware of its potency. Imagine running into this bugger unknowingly like a normal recreational swimmer.  It is unknown how many deaths from Irukandji syndrome have been wrongly attributed to other causes.
779464
The Stinking Corpse Lily\nSee link below....;
692503
a scorpion..especially since I've seen one in my kitchen sink. I used the detachable hose to push it down the drain. I was a nervous wreck. My husband has found two in our shower before I found that one. I just don't like them at all!!
1147082
Rabbits are the natural prey for numberous other animals.   Tortoises have almost no natural enemies.
277110
Largest blue whale, about the size of a small car.The smallest mammalian heart would belong to the estruscan shrew I would guess
1136529
Yes, all cephalopods are predators. The size of their prey depends on their size (or rather, the size of their "beak" and mouth).\n\nHere's a very small cute one (not much to do with the question, but it's beautiful):\nhttp://www.tonmo.com/images/content/basicocto1.jpg\n\nPS: I found this site with good information and also a photograph of the octopus beak :\nhttp://www.royalbcmuseum.bc.ca/programs/expert/octopus/index.html
14827
If you mean by the most-killing animal, it is the mosquito.\nSome might say human beings although human beings are not animals at all but their bad attitudes and negligence make them non-rational as animals and worse.
880931
Probably a komodo dragon or crocodile. Most people don't know what a komodo dragon is so I have included a link with some pictures.
540916
A large endangered mammal that is notorious for its poor eyesight. The largest can weight up to 1,500 kg and be as high as 1.60 m. Despite its mass it is a fast animal that can run to speeds as high as 60 km/h.
1180981
The most dangerous animal, besides man, is the mosquito.  They carry malaria and other diseases that kill 1 million Africans a year.  Bug repellent, mosquito nets and staying away from standing water is probably the best bets in avoiding them.
949150
Oh....Smallest to largest...\nCrayfish, Dove, Quail, Squirrel, Bullfrogs, Teal, Rabbit, Pheasant, Feral Domestic Cat, Swamp Rabbit, Wood Duck, Pintail Duck, Mallard Duck, Canadian Goose, Snow Goose, Speckledbelly Goose, Turkey, Deer...starting next year, Black Bear.\nOn occasion...Crow, Bobcat, Opossum, Coyote, Wild Dog.\nAnd I eat them all...except the bobcat, crow, wild dog, feral domestic cat, and coyote.\nI don't think I left anything out.  The only other critter I could think of is wild hogs, and I try my best to steer clear of anything resembling a pig.  Pigs are evil, vile creatures, and the only good thing that comes from them is bacon and sausage.
164174
The Daddy Long Leg is the deadliest but has to small of a mouth. The spider cant transfer venum. Not enough width in the jaw area to get around any skin.
443060
Octopuses are highly efficient predators.  A small octopus might take prey such as shrimp or small crabs, but one like the Pacific giant octopus will usually eat large crabs, grabbing them with its tentacles and biting through their shell with its hard beak, but can also take larger prey, up to and including sharks 6 or 7 feet long.\n\nOne of the reasons the octopus is so skilled at camoflage though, is the fact that many other critters consider it tasty as well.  They often hide during the day, and hunt at night.  Some species are such spectacular mimics that they can fool their predators by appearing to be rocks, coral, or even a group of sea snakes.
535730
FLESHSNAKE!! ROTFLMAO\n\nThat is f@ckin hilarious!
105504
The African honey badger is the only animal that, if cornered by a human, will attack the groin area first.\n\nAlso, scorpions can live without food or water for over a year.
969114
black mamba, from kill bill vol II :)~\n\nwell i actually looked it up and 2 sources say it is this inland taipan snake...\n\n1) Fierce Snake or Inland Taipan (Oxyuranus microlepidotus ), Australia. The most toxic venom of any snake. Maximum yield recorded (for one bite) is 110mg. That would porbably be enough to kill over 100 people or 250,000 mice. These rare snakes are vitually unknown in collections outside of Australia.\n\nBlack mamba actually comes in 11th place :(
796504
Any spider with a "fat round body" as you put it, is most likely a garden spider family Aranaeidae. These are the very commonly spiders that build large round "typical" webs between bushes, trees and on people's front porches. They are very effective at catching and killing large flying insects, so let it be, it'll do more good than evil. None of these spiders are venomous to people, most (even the big ones) arent even able to deliver a bite, so no worries, hope this helps!