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What’s your opinion on keeping fish in fishtanks?

I’ve gone back and forth in my mind about it. Part of me just feels like it’s unnatural to take something that lives in something as spacious and expansive as the ocean and put it a glass case. Assuming the owner is responsible, did their research, and is properly maintaining everything, the two biggest caveats for me are the space and exposure to other fish.

As far as the space goes it pretty much comes down to the fact that a fish tank can never fully replicate the atmosphere of the ocean or even a lake or pond, not even just when it comes to size but even contents. From towering seamounts and deep-sea trenches to vibrant coral reefs and expansive plains, I feel like a fish in a tank misses out on all of that. More importantly maybe though is just the social life that these environments provide. I’m not a fish expert by any means but one thing I hear a lot is about how social they are. How a lot of these sea creatures live in schools which can consist of thousands or even millions of fish and can become quite stressed when isolated.

Admittedly part of this is me being biased. I’d like to imagine that fish are these majestic creatures who yearn to explore and swim through the vast expanses of the ocean like it’s their own personal wonderland but I could very much be projecting my human emotions on to them. There is a chance that more than anything they just want stability which brings me to the counterpoint, that a fish tank offer safety and security that the ocean doesn’t. Again if the owner is doing everything right then being a tank fish pretty much guarantees free food everyday, safety from predators and other dangers of the ocean. Kinda goes back to the long-standing dichotomy between freedom and security. Just curious if fish could talk which would they choose
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Jayciedubb · 56-60, M
Although the ocean is vast, most fish don't do much exploring of it. You have to consider the amount of whats called head pressure that they live under. That's the amount of pressure created by the depth of the water. For every vertical foot of water, 0.454 PSI of head pressure is created. This is the same amount no matter how big the vertical column of water is. In other words, if you had a 10 foot length of ½ inch ø pipe, full of water, and stood it in the vertical position, and a 10 foot length of 8 inch ø full of water in the vertical position, (bare with me. I read your whole post😉), and measured the pressure in PSI at the bottom of each pipe, and took a pressure reading at a depth of 10 feet in any fresh water lake (salt water might behave slightly , very slightly differently), the pressure will be the same on all three measurements. 4.54 PSI.

This is important because that pressure will be what determines the depth at which a species of fish will be found. Some types of fish have adapted to live deeper in the ocean. They live so deep that when caught and reeled to the surface, their eyes will bulge out because they no longer have so much pressure all around them, keeping their eyes from buldging out. There are only so many species of fish that are suited for living in fish tanks

Side note: we all live under a constant pressure of 14.7 PSI at sea level and it decreases the farther we elevate from there. Its our atmospheric pressure (the weight of all the gases that make up our atmosphere, mostly nitrogen). There are different classifications needed, the deeper you want to scuba dive. The most basic scuba cert is good to a depth of around 32 feet deep. Thats because atmospheric pressure (14.7 PSI) divided by head pressure (0.454 PSI) equals 32 feet deep. Going deeper causes the nitrogen to bubble out of your blood like the bubbles in a carbonated soft drink when its opened, if you dont return from deeper depths slowly and gradually. ..side side note: still with me? Since siphonic action works from Atmospheric pressure pushing down on the liquid being siphoned, a siphon can't siphon liquid higher than 32 vertical feet.

Ok, where was i about the fish?..

The large schools of fish have adapted or evolved to exist in those large groups so that they are seen as something bigger than the fish that like to otherwise eat them.

Do you ever wonder if there would ever be any fish astronauts? What would their spaceships look like? It must be a strange concept to live in such a vast yet extermely finite environment. Eventhough their habitat is a much larger portion of the planet than ours, we still have the rest of the universe to ponder and study

What about what's one of the most important inventions and most important discovery and the wisdom to be able to create it for ourselves, the wheel, and fire, neither of them would ever be recognized by fish.
Spectra · 26-30, F
@Jayciedubb You raise an interesting point. The crazy thing is that it’s not even just their environment that’s limited but even the fish themselves. They pretty much can only swim around, eat, sleep, and reproduce. They don’t have hands and feet like land animals to run around play, and manipulate their environments. It’s like one step up from being a plant or single celled organism that just floats around. Feel like if there were a fish astronaut it’d have to be either something that’s already semi-aquatic or a marine mammal or maybe even an octopus or something
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Jayciedubb · 56-60, M
@Spectra ...sleep? Do they? How do you know? Most of them don't even have eyelids, do they? I know sharks don't sleep. If the did, they would drown in their sleep because they need to have water passing through their gills to get their oxygen.

To me, it seems like all marine mammals are stuck in their evolutionary development

I have a lot of respect for the octopus, ..unless cuttlefish count as octopus. I dont use the word hate lightly, but I think I really hate cuttlefish I hate the way they breed.

It starts out as any other. .. just watch this video... you'll see why,

[media=https://youtu.be/KT1-JQTiZGc] .. and it ain't just cuttlefish doing this kind of sneaky shit

Back to the octopus, it's believed that if they lived longer, they would end up ruling the world