Fish
🐟Jawless Fish
Agnatha
~120 species
The most primitive living vertebrates, lacking jaws and paired fins. Their skeleton is made of cartilage, and they have eel-like bodies with no scales.
Source: Wikipedia💡Hagfish can produce a bucket of slime in minutes as a defense mechanism, and lampreys have been around for over 360 million years.
2 fishs
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