The deadliest critters lurk in dark silence, ready to strike with either the barest of warnings or none at all - and with absolutely fatal venom.
1} STONE FISHStone Fish waits for you to step on it But it’s not time to leave the sea quite yet. There are two nasty things in the blue depths you should spend many a sleepless night frightened of. For the

big one you’ll have to wait a bit, for the one right below it in terrifying
lethality you just have to watch your step when you’re walking along the bottom of the ocean. The stonefish lives primarily above the tropic of Capricorn: It is the most widespread species of the stonefishes family, and is known to be found in the shallow tropical marine waters of the Pacific and Indian oceans, ranging from the Red Sea to the Queensland Great Barrier Reef.

The average length of most stonefish is about 30-40 centimeters. The largest Stonefish ever recorded was 51 centimeters long. It has a mottled greenish to mostly brown colour which aids in its ability to camouflage itself among the rocks of many of the tropical reefs. It eats mostly small fish, shrimp and other crustaceans.
The Stonefish is the most venomous
fish in the world. Its dorsal area is lined with 13 spines that release a venomous toxin from two sacs attached to each spine. Its venom causes severe pain with possible shock, paralysis, and tissue death depending on the depth of the penetration. This level can be fatal to humans if not given medical attention within a couple of hours. Immediate first aid treatment requires the immobilisation of venom at penetration site; depending on the depth of penetration this can be achieved either by firm constrictive bandaging or by a managed tourniquet sited between wound and proximal flexure.
2} The arrow frog:
Lethal TouchThat frog over there, for instance: that tiny, brilliantly colored tree frog. Doesn't he look like some kind of Faberge ornament, there against that vermilion leaf? Wouldn't such a natural jewel look just gorgeous in a terrarium back home? Pick him and you'll be dead in a matter of minutes. One second frolicking in the undergrowth, the next spasming and foaming on the jungle floor. No stinger, no bite, no venom: just the shimmering slime covering his brilliant body."They are the only animal in the world known to be able to kill a human by touch alone. They can jump as far as 2 inches."

Poison arrow frogs are in the class of amphibians. This frog can be found in the rain forests, but only in Central and South America. They are extremely small. Most are 1/2 inch in length. They also have brilliant and various colors. For example, they can be green or blue with black patches. They also have flash colors, which are exposed when the animal jumps. These colors warn other animals that the frog is not fit to eat. These animals also have a nail like plate on each toe. The poison arrow frog does not migrate or hibernate. The frog probably has one of the most unique mating styles. Before the two frogs mate they jump around or on each other and play. Another unique thing about their mating style is that after the eggs are hatched, the father takes care of the babies until the babies are old enough to be independent.The poison arrow frog has special skin, it secrets poisons which can kill other animals.
3} Box Jellyfish :Box jellyfish should really be called the "coffin" jellyfish Chironex fleckeri: a tiny jellyfish found off the coast of Australia and southeastern Asia. Only about sixteen inches long, it has four eye-clusters with twenty-four eyes, its tentacles carry

thousands of nematocysts, microscopic stingers activated not by ill-will but by a simple brush against shell, or skin. Do this and they fire, injecting anyone and anything with the most powerful neurotoxin known.
The box jellyfish are invertebrates belonging to the class Cubozoa, named for their cube-shaped medusae. The Cubozoans are categorized separately from other types of jellyfish, and are considered more evolved; Scyphozoans. Likewise, the best-known species of box jellyfish, Chironex fleckeri, while sometimes simply called "the Box Jellyfish", is only one of a category which actually contains about 19 different species. The name sea wasp is also applied to some species of cubozoans, including the afterforementioned Chironex fleckeri and Carybdea alata. Box jellies can be found in Australia, the Philippines, Hawaii, Vietnam, and many other tropical areas. Box jellyfish are extremely venomous and can kill humans.

Box jellyfish are best known for the extremely powerful venom possessed by some of their species. The Chironex fleckeri and the Carukia barnesi (Irukandji) species are the most venomous creatures in the world. Stings from such species are excruciatingly painful, either initially or as an after-effect, and are often fatal. However not all species of Box Jelyfish are this dangerous to humans.
4} Fierce Snake or Inland Taipan: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. With an LD50 of 0.01 mg/kg, it is about 10 times as venomous as a Mojave rattlesnake and 750 times as venomous as a common cobra.

The Fierce Snake is native to the arid regions of central Australia, extending from the southeast part of the Northern Territory, and into west Queensland. The Fierce Snake can also be found north of Lake Eyre and to the west of the split of the Murray River, Darling River and Murrumbidgee River. Fierce Snakes are known to live in holes, and feed on small rodents such as mice and rats. Despite its name, Fierce Snakes are not known to be

particularly aggressive, but docile. They will strike if provoked, however, injecting their incomparably toxic venom.No fatalities have been attributed to this species, and all known bites have been to people who keep them in captivity or actively seek them out in the wild.
5}The Cone Snail:The cone snails can kill you in less than 4 minutes Say, for instance, you happen to be happily walking through the low surf merrily picking up and discarding shells, looking for just the right

one to decorate your desk back at the office.With no warning at all, however, you feel a sharp
sting from one of those pretty shells -- a sting that quickly flares into a crawling agony. With that quick sting, the cone snail's barbed spear has insidiously injected you with one of the most potent neurotoxins in existence. The cone snails or cone shells, sometimes simply known as "cones", (family Conidae), are a taxonomic family of medium-sized to large, sophisticated predatory sea snails, marine gastropod mollusks.The shells of cone snails are shaped roughly like an ice-cream cone.
The narrow end of

the cone shell is the anterior end, and the wide end shows the usually very low spire of the gastropod shell.These snails hunt and immobilize prey using a modified radular tooth along with a poison gland containing neurotoxins; this is launched out of its mouth in a harpoon-like motion. Cone venom shows great promise as a source of new, medically important, substances.[citation needed]Live cone shells should not be handled, as they are capable of "stinging" humans with unpleasant results. The sting of a few of the larger species of tropical cone snails can be fatal to a human being.The shells of cone snails are often brightly colored and intricately patterned.
6} The lazy clown:
The lazy clown is from the insect world. The adult moth is just a moth, but the hairs of the caterpillar are juicy with nasty stuff, so nasty that dozens of people die every year from just touching them. By the way, it’s not a good way to go, either: their venom is a extremely powerful anticoagulant, death happening as the blood itself breaks down. Not fun. Very not fun.