Kangaroo rats, according to scientists, are the only animals that can exist without water. According to the findings, they do not have any water in their bodies for any of their digestive functions. Kangaroo rats can survive in deserts without ever drinking.
Camels can survive up to 15 days without water. One of the reasons that they can survive that long is because of their humps. They store fat in their humps (not water) and can use this to help them go longer without water.
One animal which is missed in the rest of the answers is the Kangaroo Rat. This tiny rodent never drinks water in its entire life.
Kangaroo rats have no need to drink water. They survive on the water metabolized from the dry seeds. Their scientific name is Dipodomys.
Even though their diet consists of mostly dry seeds, the Kangaroo rat has almost no need for water. Instead they survive almost entirely on the water metabolized from seeds that are eaten. Kangaroo rats can extract a half gram of water out of every gram of seeds consumed.
According to the findings, they do not have any water in their bodies for any of their digestive functions. Kangaroo rats can survive in deserts without ever drinking. The kangaroo rat has nearly perfect adaptations to desert life. Kangaroo rats can be found in the drier parts of the United States west and southwest.
As well as getting water through osmosis, saltwater fish need to purposefully drink water in order to get enough into their systems. Where their freshwater counterparts direct all of the water that comes into their mouths out through their gills, saltwater fish direct some into their digestive tract.
Snails have more teeth than any animal.
This is TRUE. A snail's mouth is no larger than the head of a pin, but can have over 25,000 teeth (but these aren't like regular teeth, they are on its tongue).
The tubeworm Escarpia laminata that lives in deep sea cold seeps regularly reaches the age of between 100 and 200 years, with some individuals determined to be more than 300 years old. Some may live for over 1000 years.
To date, there's only one species that has been called 'biologically immortal': the jellyfish Turritopsis dohrnii. These small, transparent animals hang out in oceans around the world and can turn back time by reverting to an earlier stage of their life cycle.
They react differently when external stimuli are applied while sleeping and while awake. But the bullfrog, Lithobates catesbeianus show the same reaction in both situations. This indicates that bullfrogs do not sleep. Lithobates catesbeianus is an animal that cannot sleep.
Other animals with venomous saliva include snakes; Komodo dragons; and mammals such as shrews, slow lorises, and bats. The green eyelash vipers' hypodermic, needle-like fangs lunge out during a strike, injecting hemotoxic venom that destroys the red blood cells of its prey.
There are also numerous animals with no hearts at all, including starfish, sea cucumbers and coral. Jellyfish can grow quite large, but they also don't have hearts.
Because mare's milk contains more sugars than cow's or goat's milk, when fermented, kumis has a higher, though still mild, alcohol content compared to kefir. Even in the areas of the world where kumis is popular today, mare's milk remains a very limited commodity.
Spiders usually have eight eyes (some have six or fewer), but few have good eyesight. They rely instead on touch, vibration and taste stimuli to navigate and find their prey.
In a study published Monday in the Proceedings of the National Academy of Sciences , researchers have now identified the first animal that doesn't use oxygen to breathe: Henneguya salminicola, an 8-millimeter white parasite that infects the flesh of Chinook salmon.
Oldest animal ever
The longest-lived animal ever discovered is a quahog clam, estimated to be 507 years old. It had been living on the seabed off the north coast of Iceland until it was scooped up by researchers in 2006 as part of a climate change study.
Greenland Shark
Living in the waters of—you guessed it—Greenland, this shark lives for 300 to 500 years. It has the longest known lifespan of any vertebrate species.
Babirusas are hogs that have two large canine teeth. These teeth can grow up to 8 inches long, sometimes growing right through the skin. Hippopotamus – Hippopotamuses have the largest teeth of any land animal.
The sperm whale has the largest teeth of any whale. They are visible only from the lower jaw; the upper jaw's teeth never erupt. They weigh a kilo each and can be as long as 18 cm each.
Did you know that Hippopotamuses have the largest teeth of any land animal? Their front incisors can grow to be 1.2 feet in length, and their canines can get to be 1.5 feet!
While fish do not sleep in the same way that land mammals sleep, most fish do rest. Research shows that fish may reduce their activity and metabolism while remaining alert to danger. Some fish float in place, some wedge themselves into a secure spot in the mud or coral, and some even locate a suitable nest.
Like us, fish also need to take in oxygen and expel carbon dioxide in order to survive. But instead of lungs, they use gills. Gills are branching organs located on the side of fish heads that have many, many small blood vessels called capillaries.