this post was submitted on 15 Dec 2025
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Science Memes

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[โ€“] Lembot_0006@programming.dev 7 points 2 days ago (31 children)

Are they in some separate category?

[โ€“] mech@feddit.org 7 points 2 days ago (26 children)

They're separate biological classes.
So they're about as far apart as you are from a reptile, bird or fish.

[โ€“] stray@pawb.social 12 points 2 days ago (11 children)

Not exactly. Humans, birds, and reptiles are all within the phylum chordata, while arachnids and insects are both within the phylum arthropoda.

Fish, interestingly, aren't a real thing in terms of formal classification. The term is similar to bug in that we apply it to whichever creatures we feel fit the description.

[โ€“] Johandea@feddit.nu 5 points 2 days ago* (last edited 2 days ago) (1 children)

Not exactly. Humans, birds, and reptiles are all within the phylum chordata, while arachnids and insects are both within the phylum arthropoda.

But all fish, no matter which classification you use, are also part of the phylum chordata, just like reptiles, birds and mammals. @mech@feddit.orgs statement still holds true.

[โ€“] stray@pawb.social 2 points 2 days ago

It took me a bit to understand what you mean, but I get it now! I was looking at it from the perspective of them being quite similar, but they are as different, aren't they?

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