Why Fish Can Drink Salt Water And We Can’t

When we drink saltwater it can kill us, yet our oceans are teeming with life. Why can some species survive in saltwater while others can’t?


Read More:
Study Sheds New Light on How Some Fish Adapt to Saltwater
“Tilapia fish readily adapt to fresh or salty water, making them both good candidates for aquaculture and potential invasive pests. New work at the University of California, Davis, shows how tilapia can change the protein makeup of their gills, allowing them to nimbly adjust to widely varying levels of water salinity.”

Why Is the Ocean Salty?
“How salty the ocean is, however, defies ordinary comprehension. Some scientists estimate that the oceans contain as much as 50 quadrillion tons (50 million billion tons) of dissolved solids. If the salt in the sea could be removed and spread evenly over the Earth's land surface it would form a layer more than 500 feet thick, about the height of a 40-story office building.”

How Do Salmon Change From Freshwater to Saltwater Fish?
“For decades, researchers have tried to find out what regulates changes in salmon when they transform from being freshwater to saltwater fish. Now they have come a little closer to an answer. A new study shows that light -- increases in day length in the spring -- affects developmental processes in the fish's brain during smoltification.”
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[MrMentalz]

its really incredible how different fish can adapt these salty waters. actually adaption in general is just so fascinating

[muchcomment]

Salt is everywhere, especially in online games....

[BEATFINITY]

Try to keep this comment at the odd number of likes

[JoinTheCyborgs]

The CS:GO community drank the whole ocean.

[Full_Throttle_no_Brakes]

Ok. I understood the explanation about the fishes. But what about the mammals who lives in the ocean?

[Hathur]

I love this channel, always learning new interesting things :)

[Paveluck]

Trace has been with dnews for as long as I can remember and hasn't left them like lots of other presenters

[ZanderLexx]

2:54 Who let the fish out bloop bloop.. bloop bloop bloop ?!? ;-)

[kriwient]

because we are only slightly aquatic. we can get rid of excess salt through tears and sweat but that's not enough.

[aboubrad]

can you do a video on how gills work? how do they extract and isolate oxygen from seawater? thank you for your kind attention

[potugadu]

@2:59 "Great Dying"? Couldn't they have come up with a better phrase!

[bobbyharper]

How do fish spontaneously appear in ponds?

[drennyvision]

I think you mean CREATION is the BEST!!!

[uncutfishing]

Actually, newly spawn Atlantic salmon live in rivers not for "months", but for 2-3 years before migrating to the ocean or the nearby sea, sea trout stay for 2-4 years, etc. Fish grow slower and live longer than many think they do.

[ProphetJodi]

love that the link was in the video on mobile

[borkmaster]

I like to eat salt, the pure and amazing delicious rock.

[mackenzieabts]

Trace is probably my fav member of this channel tbh.

[TheRCBasher]

I am watching this in isolation as our school is closed

[finn]

You guys should do an episode on the weirdest way organisms obtain energy

[Xenn]

Hey DNews, could you do a video on explaining how soda get's its carbonation and the process of how things get carbonized?