Any-Broccoli-3911 t1_iy62m35 wrote
Reply to comment by atomfullerene in Eli5: Why do birds and fish come in such a spectacular variety of colors and shapes compared to other animals? by thetravelman888
All fishes are one group if you include tetrapodomorpha (amphibian, reptiles including bird, mammals).
https://biologue.plos.org/wp-content/uploads/sites/7/2020/05/Fig1_FToL2-scaled.jpg
If you don't, then fishes are not one group. Not even bony fishes.
atomfullerene t1_iy6544e wrote
> Not even bony fishes.
Sure, but there are 8 living species of bony fish that would not be in the group, so the vast majority of all color and shape diversity in fish is in that one group.
Dorocche t1_iy692fm wrote
And it's far more accurate to say those 8 species aren't "true" fish than to say that fish doesn't exist as a category.
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