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SunCloud-777 t1_it603bc wrote

Reply to comment by WashingtonPass in Sharks are the preferred scraping surface for large pelagic fishes: Possible implications for parasite removal and fitness in a changing ocean by WashingtonPass

true. shark skin is abrasive and coarse, like sand paper (not the fine grit ones). no wonder other fish use this predator to scrape off their ectoparasites. the fish help each other out.

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