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Sharks has no bone, they have skeletons made of cartilage which may reflect the primitive origin of this spices which lasts for a long time from the Devonian period about 400 MYA (Figure 01). It seems that their appearances do not change over the years as shown in Figure 02 for the various kinds of modern sharks (by courtesy of ChatGPT). They are supposed to be the apex predators; now the hunters become the hunted for human to consume including the Shark fin soup. |
Figure 01 Devonian Shark |
Figure 02 Modern Sharks (by ChatGPT) [view large image] |
Followings are conversation with ChatGPT (in Italic text) about sharks. |