How can fish live in the sea?

Question

We human can't drink sea water because it's too salty. Fish need water to survive and how can fish live in the sea (Isnt that too salty ?

Answer 1

Some fish can't drink salty seawater either. But fish use water the way we use air, they use it to breath and of course they don't need to drink but salt water is the natural state of all sea creatures and almost all fish, fish however do need disolved oxygen in the water or they will suffocate just like we would without air.

An interesting fact is that our bodies have almost the exact same ratio of salt as does the ocean.

As to the exact why...put simply, it's just that our kidneys were not adapted from having to deal with alot of salt or salt water, our ancestors drank fresh water often enough that we aren't adapted to drink salt water very well, people can drink salt water but after a couple of days the effects are very bad.

To be fair , we do need a certain amount of salt, just not too much.

Answer 2

Fish are built to live in the sea (at least most fish are -- I'm not talking about fresh-water fish). Their skin and stomach are made so that they don't absorb too much salt from the sea. The flesh of sea fish is a good source for fresh water if you're stuck on a life raft in the middle of the sea.

Humans, on the other hand, are build to live on land. The problem for most humans, before the last few centuries, was getting enough salt. So, food with some salt tastes good, and human stomachs are build to absorb salt from what they eat and drink. But in today's world, the processed food we eat has too much salt!! That's why some people get sick.

Answer 3

Well, this is because human beings and animals (particulary the fish) were made diffrerently. Organisms tend to adapt their environment and fishes adapt to the sea (salt water) and we human adapt to land (fresh air). Besides, a fish is built to withstand the negative effects that salt water would have on us. Look at it this way, just like how we humans cannot drink the sea water, it's the same thing with fishes and land, they cannot breathe on land! I hope this answered your question in some way...............

Answer 4

Life on earth originated in the oceans and as the oceans gradually grew saltier (salts are dissolved from the land and carried to the oceans but then when the water evaporates the salts are left behind, but only so much salt can be dissolved in water and we've reached that level so the excess salt settles out) life in the oceans has adapted to it. When life in the oceans moved into fresh water (fresh meaning with little or no salt) it evolved to adapt to the less salty water.

Answer 5

Different types of fish;

salt-water fish have adapted to the sea's salt
fresh-water fish have not, so they live in non-salty water

Answer 6

The lifeless Sea is really a huge inland lake seventy six KM lengthy, as a lot as 18 KM huge and that is four hundred meters deep on the personal factor. The call "lifeless Sea" for the Hebrew "Yam Hamelach" (Salt Sea) became attributed by technique of Christian clergymen, astonished by technique of the glaring absence of any type of existence interior the sea water. modern-day clinical analyze although, got here across 11 sorts of micro organism interior the water; yet in wells each so often in common words one meter from the lifeless Sea shore - for instance in Ein Zuqim (Ein Faskha) interior the north lifeless Sea section, stay unique, indigenous small fish. This species developed from enormous carp problem-free interior the Lake Tiberias; those small fish are often shocked by technique of a wave of very salty water, yet have tailored to survival in those frustrating circumstances. the realm grants beautiful landscapes: interior the southern sector, mushroom-like hills from a mixture of minerals and sand were sculpted by technique of erosion from wind and floods interior the mountains of Judean the desert. interior the northern sector, threatening rocky cliffs upward push thousands of meters intense, with sweet water streams and waterfalls in beautiful Nature Reserves, finished of organic international. Describing the area, the biblical geographer George Adam Smith says: "easily there's no area of earth the position Nature and heritage have more effective cruelly conspired, the position so tragic a drama has gained so undesirable a theater" (historic Geography of the Holy Land, 1894) an glaring hint to the biblical tale and destiny of Sodom and Gomorrah.

Answer 7

Salt water fish constantly battle the fact that salt water has a higher concentration than they do, and thus, water tries to leave them. They actually drink a lot of salt water but through their gills and urine/feces they excrete a lot of the ions that they take in through drinking so much salt water.

Answer 8

Some fish are designed to handle the salt water. It's in their design.

Answer 9

They expell the salt when they breathe.
They actually don't breathe the water; their gills take in oxygen in the water.

On land, they can't breathe because their gills collapse.

Answer 10

They're special :)

fish have special organs that deal with the salt.