this post was submitted on 06 Oct 2023
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chapotraphouse
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There are several major classes of "fish". Sharks belong to the cartilaginous class (along with rays and skates). The other major classes are the lobe-fins and the ray-fins. The ray-fin class consists of most of the typical fishy fish that we are familiar with, like salmon, goldfish and tuna. The lobe-fins consist of lungfish and ALL TETRAPODS! That's right, you and I are technically lobe-finned fish.
Also, tuna are more closely related to humans than they are to sharks.
Dolphins are lobe-finned fish.
Just thinking about that longass evolutionary journey they took to end up right back to looking like a shark is exhausting!