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1. Mate selection2. Predator defense = spines and flaring them out3. Homeostasis/thermoregulation 4. Camouflage 5. Fins can also be used for tactile (touch)

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1. 1. Mate selection
2. Predator defense = spines and flaring them out
3. Homeostasis/thermoregulation
4. Camouflage
5. Fins can also be used for tactile (touch)





 
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