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Questions tagged [scales]

The tag has no usage guidance.

18
votes
2answers
1k views

Do the majority of fish lack scales on their heads?

Based on pictures, it seems to me that a vast majority of fish species that have scales do NOT have scales on their heads. Is that fact true? To make this properly answerable: lets' define a "...
7
votes
2answers
1k views

What did pangolin scales evolve from?

Were they developed anew or a heritage from fish?