can all animals swim?
962319
Animals evolve to suit their habitats. Monkeys have tails that allow them to grip whilst brachiating through trees.\nMy point is, if an animal is to be born in a place with water then technically it should evolve to be able to swim. If an animal such as a desert creature was to be evolved then it wouldnt need to be able to swim. So no, not all animals can swim because they dont need to so they didnt need to be created that way.\n\nHope that helps!
60834
Yes, they can run up to 45 mph.  Penguins can swim at 40 mph.
887471
they can!!!!!! just short distances.   ever try to catch one:) it will fly!!!!
570841
fish, sharks , whales, crustaceans of all types.
566543
No animal can travel that fast naturally. Unless they were sitting on a volcano when it went off :)
679412
Whales are air breathing mammals, but they need their bouyancy (so they don't touch bottom and have the affect of gavity on their very dense body tissues). When in too shallow of water, the weight of their own body is so intense that they are then not able to inhale-exhale as easily-deeply as they do when bouyant and self-motile with their strong muscles and movement; then the carbon dioxide builds up in their tissue while the oxygen is not adequately replaced-increased.  Also many of these beached animals have parasites, some in their inner ears or brain that infect their tissues and this seems to impair some of their "judgement" when going close to shore.  They are also quite gregarious socail animals and often want to help other ailing whales; some may be good semaritans who get stuck with the other ailing whales.
114605
Having gills is prerequisite for being a FISH, dear. In fact, their scales secrete a gunk that acts as a laxative. Yes, they have a swim bladder, but it works more like a shark's liver than a typical swim bladder.
263149
THeir fur is actually colorless, it absorbs light to heat their bodies.  It works so well, that they frequently have to swim in freezing waters to cool down or roll around in the snow.  They aren't very active either becasue then they would overheat.
723240
They can't swim until the down that they are born with turns to feathers (which are waterproof). Emperor penguins start swimming at about 4 months old, not sure about other species.
228732
Interesting question, but I think you're putting the cart before the horse. \nI could say that they don't live out of the water because their many specializations make it impossible; you've seen what happens when a whale gets beached. \n\nAnd why not turn the question around? Why not ask\n"If dolphins live in the water, why do they have lungs instead of gills?"\nThe thing is, adaptation is a phenomenon that usually shows us amazing results, such as the entire lifestyle of cetaceans (and they have many specializations for aquatic life). But a specialized or well-adapted animal is not "perfectly" fitted, because of the way evolutionary processes work. \nEvolution and natural selection can only work on the "materials" that are already there; and the lungs of mammals are not something that can be "reverted" to gills; their origin goes way back to remote ancestors of the whales. This irreversibility of _complex_ evolutionary processes is known as Dollo's "law" (and creationists love to misinterpret it). Stephen J. Gould gave a good example with the giant panda's "thumb" (this additional finger arose from one of the bones of the carp (wrist), and the real thumb of pandas is as reduced as in the rest of the Carnivora). \nEven if cetaceans where to evolve back into terrestrial animals, the results would not look like their ancestors, or probably anything that we know.
331230
Yes.  A whale is a mammal, and one characteristic of all mammals is that they reproduce sexually.
602428
All animals live on the Tundra
1047932
Yes, so all the little creatures can scurry out of the way.
689395
All use thier kidneys, just as mammals do.\n\nSome seabirds (not all) also have special salt exctreting glands at the base of their beaks that helps them remove excess salt water.
562934
It is a myth that sharks have to constantly swim or else drown.  As so often with exotic animals, apex predators in particular, we find such stories to be passed on through generations, and even tons of excellent studies on the animals cannot change commonly held opinion.  What is the basis for this wrongly held believe?\n\nMost "fishes" breath by producing a conintuous water flow over their gills making use of what is called the buccal/opercular pump.  You surely have observed fish in an aquarium before, and have noticed how they rhythmically open and close their mouths.  What you may or may not have seen was that in the same rhythm, only slightly delayed, a bone on the side of the head opened and closed.  What you saw was the buccal/opercular pump at action.  The bone on the side of the head was the operculum.  It covers the gill openings with the gills.  When the fish opens its mouth (i.e., the buccal cavity), the operculum is closed.  The fish fills its mouth with water rich in oxygen, opens the operculum and at the same time closes its mouth.  As an effect, the water is being pressed out through the gill openings and over the gills.  Next, the operculum is closed while at the same time the mouth opens and the cycle is repeated.  By this form of active breathing the animal can indeed achieve a constant flow of water over its gills. \n\nSharks, like all other elasmobranchs (i.e., sharks, skates, and rays) do not have operculi.  Instead, their gill slits are visible at the side of their heads.  Early biologists thought that sharks therefor could not be stationary at the sea bottom, since without an operculum they could not achieve water to flow over their gills and would certainly - believe it or not - drown.  Not quite so.\n\nIt is true, sharks usually breath "inactively", that is they achieve a constant water flow over the gills by swimming with their mouth slightly open.  But quite frequently, sharks can be found stationary on the bottom, where they breath actively.  Like teleost they achieve this feat by opening and closing their mouths.  The lack of operculu certainly makes this form of breathing less sufficient, but the gill openings are constructed like window blinds that are partially closed (or opened, in case you are an optimist...).  In other words, water can be pushed through in one direction, opening the gill slits, but if it were sucked the other way the individual skin flaps collapse on top of one another and close the openings.  It is not the most efficient form of breathing, but it works.  \n\nAt times, you will find animals that hover on the sea floor positioned in a moderate water current so that by simply opening their mouths the current constantly moves water over their gills.  But even without this current, sharks can do quite well breathing actively on the floor.\n\nI suggest, you take your son to an aquarium and check out some of the sharks on display.  I am sure their will be one or two specimens hanging out happily on the floor demonstrating what I just described.\n\nHope this helps.
535375
i think animalia contains all animals - fish, reptiles, mammals, birds and amphibians. dolphins are obviously not bacteria, fungi, insects, etc. if you meant mammalia it is because dolphins -\nbreathe air with lungs, not gills\nbreastfeed their young that do not hatch from eggs\nhave four chambered hearts
1061056
most of the animals mentioned so far can swim, but they are so inefficient at it they are never seen doing it. There are a very select number of animals in the entire world who are physically incapable of swimming, and the majority of them have adapted to living in places where water is almost non-existent. The food of small desert reptiles can include tiny herbivorous organisms such as flying insectoids that are happy to sit on still water, and are highly bouyant, but are incapable of directional swimming on the surface or underwater (Its easier to simply fly for these animals, so the ability was never needed and thus never developed).