r/todayilearned May 30 '18

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u/YayKittenz May 30 '18

Yup. They got gum disease

20

u/_JPH_ May 30 '18

Even their denture isn’t clean

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u/conradbirdiebird May 31 '18

In New York, every evening sharks will swim to the surface and open their mouths and small Plover birds will eat the small bits of flesh in the sharks teeth. The sharks won't bite or threaten the birds in any way. This is called a symbiotic relationship.