The Layers of the Ocean

[@jerseyboyce1]

i often skip over videos about things i already know, but i do watch yours, even if i don't learn anything new you will have given me a great way to explain a difficult topic to a lot of people. i appreciate all that you do.

[@The_Fancy_Duck]

Thanks Dave for explaining the layers of the ocean.

[@jessicadeines]

I am amazed to have found out they found life in the Mariana Trench, just amazing how resistant life can be.

[@onwardandupward2345]

... yep Jacques Piccard made it to 35,798 feet and reported seeing fish down there....amazing...

[@blahbleh5671]

...and a plastic bag

[@onwardandupward2345]

@@blahbleh5671 yeah, probably, man thats so depressing and worrisome the amount of plastic in the ocean..and for the most part it is mostly the recyclable thermoplastic that is found in the oceans as opposed to the non recyclable thermoset plastic, which goes to show, people aren't recycling like they should be...they continue throwing recyclable plastics in their garbage, it ends up in land fills and ultimately to water sources...

[@Danfail100]

As usual brilliant and informative. I like your style prrof. Dave. No sign of " sensational" wording, just the facts. I always feel i learn something

[@mikotagayuna8494]

It's amazing how sea creatures start looking more like nightmare fuel the deeper we go.

[@MonsieurFeshe]

They're just better adapted to their environment, you'd look weird to them too.

[@whatnew95]

@@MonsieurFeshe lol

[@qwertydog9795]

earth is weird, awesome, and scary. I've been on mountain roads so high it hurts to breathe, with breathtaking views to match. endless walls of dark green pines so close together it looks like a blanket. I can hardly imagine such immense depths. point being, most of the time the natural world has this eerie way of making you feel quite small. and this is just one planet out of who knows how many.

[@ReddoFreddo]

Question: how can angler fish attract prey with light if presumably all their prey is blind? If the prey isn't blind, what use are their eyes without any sunlight?

[@Bretaxy]

I would think that they're not completely blind; e.g, their vision is lacking but still capable of seeing a difference between pitch dark and light.

[@valorrye2342]

Not completely blind but at least able to detect light and dark. Kind of like how you can kind of tell whether or not it's bright or dark when you close your eyes.

[@quexalcoatl]

There are other critters in the same environment that use bioluminescence to find food and mates.

[@peterprime2140]

There are some deep sea fish that travel to shallower waters.

[@amizhthanilayaraja884]

@@Bretaxy If they could see it, why would they be attracted to light? I mean shouldn't light ne thought of as a sign of danger?

[@backstreetfan2887]

I liked the part about the tan bristlemouth fish because I have never even heard of that fish before

[@SandraThePhox]

I can never explain how much I appreciate your videos. I swear you're my favorite KZbinr. From debunking fake science, creationism nonsense and just general scientific education. I love it all! Thank you.

[@evilotis01]

absolutely fascinating, as always. thank you so much for everything you do

[@quexalcoatl]

Thinking the next video will be on marine volcanism and touch on some chemotrophs! The ocean stuff is so fascinating (and horrifying), it would be neat to explore in another series on it's own, or maybe limnology instead. Lakes are full of interesting cycles and food webs.

[@DarkVVitcher]

Thanks Professor Dave, interesting subject indeed ! I was wondering if you're willing to do an episode about insect taxonomy as I'm an Entomology student and I always feel that it's a subject doesn't get mentioned so often. It would be really great if you did that ! And I'm sure you'll find it fun :D And thanks again for every video you've ever done as I watch a lot of them and not only the one's on Biology.

[@ProfessorDaveExplains]

All the insects will be covered in zoology!

[@PaulMab9]

@@ProfessorDaveExplains Cool! I know it must mean an immense amount of work, but every topic you cover is a boon to scientific education as a whole!

[@tygerbyrn]

I love the colorful illustrations. Visual appeal and informative to the max! Keep up the great work! 👍

[@MonsieurFeshe]

"It is home to only tube worms and sea sponges" Snail fish would like a word with you.

[@Ensaima]

You will allways remain my top 1 favorite youtuber. I would love to have you as a teacher

[@livignij]

Just got your book, excited to start it.

[@Rryan8065]

Fascinating topic, enjoyable video. Good job and thanks Dave!

[@jovanabogdanovic2680]

Came here from the math lessons! You are the best teacher!

[@subbss]

Everything about Earth's oceans fascinates me, so I am looking forward to more, either about geology or zoology. Cheers Dave. :)

[@high2407]

Hey man haven't seen ur stuff in a while and tbh I think you're one of the best science educators out there. There is an unbelievably immense difference between how you and other real science people approach subjects, and the Dunning-Krugers that you've debated in the past, who prop up absolutely no footnotes where due. That being said, I now know a bunch more about the giant ball of rock and water we're currently living on :) THanks Also... what would happen to the animals from the Abyssopelagic if they'd come to the stores. How would they morph to hundreds of times less their usual pressure lmao

[@JCO2002]

Very good, thanks, although I must admit that the ocean terrifies me. Sharks, tsunamis, who knows what, plus you can't walk on it or breathe it.

[@krentenkop]

Thanks Professor Dave.

[@waelfadlallah8939]

What a mysterious world under the water

[@MonsieurFeshe]

Actually, lanternfish are much more abundant than bristlemouths in general.

[@420AtheistOG]

Love your work Dave!

[@b0b5m1th]

Bouncing off a halocline in a miniature submarine is a very surreal experience.

[@Ensaima]

Yeah, but “water finds his own level”

[@Bretaxy]

?

[@Ensaima]

@@Bretaxy flat earth reference

[@frogstamper]

02:47 This tan bristlemouth fish looks like its been decomposing for a few weeks, almost like a zombie-fish...you always learn something new with Dave's videos.

[@mistafizz5195]

Dave is a true polymath

[@ryano3277]

Thankle Dave

[@asifuzzaman21]

Please do a video on the deep sea creatures.

[@logiticalresponse9574]

thanks dave

[@criticalfan4389]

Cool stuff!

[@zoranocokoljic8927]

@3:34 If Abyssopelagic zone is from 4000 to 6000 meters, then pressure in it should be from 400 to 600 atmospheres, right?

[@dotanuki3371]

yep

[@ER_aka_RAM]

Fawesome episode 🤙🏽

[@flatearthisahoax4030]

The Earth's Ocean is just as mysterious as the Outer Space

[@AdityaTheGoat]

this guy is smart

[@zecuse]

3:06 The telescopefish from the genus Gigantura beg to differ. Their eyes make them look like they're permanently on the world's biggest acid trip.

[@celestialsatheist1535]

professor Dave. can you do a video on the zero universe hypothesis

[@tonydagostino6158]

As you say, those must be oceanographers terms. In my 42+ year career as a geologist interpreting paleobathymetry from microfossil data and other means I've never used, or seen in publication the terms bathyalpelagic, abyssalpelagic or hadalpelagic. Marine geologists use (shallow to deep) inner, middle and outer neritic, upper, mid and lower bathyal, abyssal and hadal without the "pelagic" modifier.

[@heroinboblivesagain5478]

Ah geologists... Engineers of the natural science world... How do you know if someones a geologist...They'll tell you.

[@cguy96]

A good coverage, but I was a little surprised when you said the layers of the ocean, and then concentrated on the biological aspect. I somehow thought you were going to concentrate on the physical ocean layers (surface or mixed, thermocline, and deep). But just a few points. 1) Physical oceanographers are better described as scientists who study the energy transfer in oceans and across boundaries, as well as the physical interactions between the water and its surroundings. 2) All oceanographers would call it the epipelagic zone, but if you were to attribute to one particular discipline, biological oceanographers would probably be more accurate. 3) As far as contributions to the ocean floor (although obviously not ocean crust!), one you could have covered is biogenous sediment, which is largely made up of the skeletons of phytoplankton, either Calcareous (calcium-based) or Siliceous (silicon-based). 4) Although they vary both spatially and temporally more than the biologic zones, since you mentioned layer depths, the depth of the surface/mixed layer ranges from near 0 to about 250m. The thermocline lies under the mixed layer and has a thickness from 300m to 1,000m but rarely extends deeper than 1,000m overall (mixed+thermocline). The deep layer is everything under the thermocline.

[@juhanipolvi4729]

Just a guess: hadal is probably a reference to Hades (the place in ancient Greek mythology) ?

[@Cosmicvindicator]

whoa u still upload

[@onwardandupward2345]

how do the flat earthers explain tectonic plates?...

[@Ancipital_]

Tectonic whats?

[@chavez13571]

So at what layer do I mine for diamonds ⛏

[@lionablaze8747]

there are some seriously scary species living in the deep ocean.

[@Neptune997]

That is scary 😮even as a scuba diver.

[@Leumas34676]

Go on jeopardy

[@MaryAnnNytowl]

Always interesting! In return, here's a like and comment for the Almighty Algorithm. 🙂

[@mactallica9293]

How deep is Nessy?

[@kingcrabbrc]

Yeah but, water finds its own level so...

[@Bretaxy]

?

[@clubpenguin13531]

@@Bretaxy joke about flat earthers

[@Ratciclefan]

Oh wow

[@justsomeguy4260]

Hello Dave I wonder if you also do astrophotography

[@incredible916]

Kind of makes me think of the Book of Luke when the demons Named Legion possessed a man and ask if Jesus would send them off into The abusos Greek for abyss, and the spirits were cast into into a herd of pigs and then jump into the sea and drowned. Now that’s what Luke saw, it it’s possible those pigs lived because they were possessed and became the sea pigs from that level of the sea amazing.

[@yedder7628]

This is science not religion

[@thegameranch5935]

@@yedder7628 who cares, he just talks about his opinion no problem in that

[@yedder7628]

@@thegameranch5935 ya we all have opinions

[@jessicadeines]

Did you know more people have been in space than in the deepest parts of the ocean?

[@gr_d5427]

Hello

[@Interstellar_UwU]

❤❤❤❤

[@dtownbulls7]

congrats on your win on baggage!

[@illones2196]

OK now what mr know it alllll....I mean professor know it all...FOH

[@ProfessorDaveExplains]

You ok there, kiddo?

[@daffyd9977]

Hey Dave are you still working on the debunk of Eric Berg ? I still see his videos a lot and many people think what he’s saying is true when most of his claims are nonsense

[@ProfessorDaveExplains]

I will get to it eventually.

[@konnor9577]

Again some greek name that? or just used greek words ?

[@-JA-]

🙂👍

[@PotatoChips-jy9pk]

Oh no. I have thallasophobia

[@fatimahaidari]

🖐🥰🤩🇦🇫

[@gr_d5427]

Nzo painting

[@Caterpillar_insect]

Bruh

[@TehRealChruZ]

1000th like hehehe

[@EnverHalilHoxha1917]

Heloooooo I like angler fish Go fish

[@kthuludev]

m

[@TheCosmicGuy0111]

Swimmy

[@celestialsatheist1535]

First

[@amut6647]

For a channel with 2m+ subs you get barely any views on the majority of your vids.

[@ProfessorDaveExplains]

This has been up for one day, bud. Learn how educational channels work.

[@joewittstock]

Dr. Yabba Bobba Do...Kent and his grand tour..the rocks in Kent's head..keep getting tumbled around..and his deck of Majic cards....explain the Geologist column...watch how Real Geology suddenly disappears Wow