Deep-Sea Dentists: How to Clean Your Teeth in the Ocean

Cleaner fish are known for their unique behavior. They eat parasites, dead skin and food leftovers from the mouths of other fish. Cleaner fish have a bright marking that helps other fish recognize the "servants". A "client fish" willingly opens its mouth and lets the "cleaner" in. When the "client" is satisfied, it shuts its mouth for several seconds and then opens it back. The "cleaner" leaves. The video features a Hawaiian cleaner wrasse (Labroides phthirophagus).