Ichthyology Lesson 4 - Internal Anatomy

I read most if not all comments, so feel free to ask questions, but If I don't get back to you, stop into a twitch stream or my discord and ill answer whatever you need.

[eggzisstenshulldredd]

It's so great seeing @AVNJ's face go from disappointed shocked reactions of pseudoscientific YouTube videos to pure happiness when you're about to teach. In short, when you smile, I smile :)

[pinksnowday]

thank you for making ichthyology so accessible!

[Soapy-chan_old]

I don't want to become an ichthyologist, but I love learning random facts and stuff, and I like this series and that you make the information accessible for anyone. So thank you for doing this :)

[horseshit]

I think you made this series at a great time, as many people who weren't interested in fish are now now showing interest in marine biology

[elliottchoi]

My dream has been to be a marine biologist ever since i saw nemo when i was 3. I’m about to graduate high school and hopefully study marine biology in college, and your videos make me really excited for what’s to come! keep up the good work 👍

[Bakauvu]

Holy shit babe wake up, a new ichthyology lesson just dropped

[MODElAIRPLANE]

So cool to see that countercurrent exchange, which we humans use in industrial liquid-liquid extraction, has been happening in fish for millions of years !

[calvinpolkinghorne]

Great video as always. I've learned so much from this series and your channel in general.

[cmegan]

I get so excited every time I see a new one of these, like a fucking nerd

[monalisasouza]

hey, thanks for those lessons. I am taking an Ichthyology class in college right now, and they are helping me a lot with my studies.

[tomasdipple]

This is the first lecture i have actually done before,
Thanks for the revision content

[falcawnknee]

So far from this, learned a lot, but I think the most fascinating of it all is the fact that fishes can regulate their buoyancy through their swim bladder, I had no idea that instead of angling themselves a certain to say, swim up or down, they rather just internally change some of the gases (or the fluids found in sharks) to help go up and down. Overall really good lecture, and I'm absolutely loving it so far. 26:31 where I'm at rn, just after swim bladder section.

Edit: Apparently sharks also have tail fins that allow lift??? So not only do they fluids in their liver that help regulate buoyancy but they also have herterocercal tails which allows lift whilst swimming? I didn't get to this until the next lecture, Locomotion. Really loving and enjoying these mate. Very well done.

[lexyk]

Woot! Professor AVNJ in the house! This is something I genuinely look forward to on Fridays.

[blankdistortion]

tbh i loved this decision to make these videos i’ve always wanted to be a marine biologist but realized the need for them isn’t in high demand so not much opportunities for me, so just wanted to say thanks for giving me and others this opportunity to at least follow up on our passions

[Preposter]

Very well done!
For 10:03, it would've been nice to see a graph with the diagram.

It also would be nice to see a comparison between tidal ventilation, crosscurrent, and countercurrent flow.
That would've explained why gas exchange in fish is efficient compared to other animals.

[TheDevtubes]

These videos should really get more recognition. It is so fucking infuriating seeing so little recognition and views for this

[bdbdavis]

I know these videos don’t do as well as your other videos, but these lectures help my marine biology course so much, I’ve seen them so many times! 😂

[nightwhisperer]

I love watching all your videos and in this series I have learned so much! Thank you and keep it up!

[chrisgaming]

So, would a fish with more white muscle be able to "sprint" faster or for longer than one with less? Also I like how this series is sort of following along the layout of that severn-hundred-page book you showed on Discord. I'm only about 200 pages into it so maybe this'll be covered in there but, I'd love to see an episode of this about how deep-sea fish survive.

[fal]

These types of videos are my favorite in this channel, keep it up!