Labroides dimidiatus or Bluestreak cleaner wrasse is one of the few marine organisms that feed exclusively on parasites found in the bodies of other marine organisms, thus offering "wellness and beauty services" to the fish that seek it to enjoy the high level of care it offers. It advertises its services with dancing movements with the tail moving up and down the back of his body! His best customers? Sea turtles and yellowbelly rock cods.