Seals are the main species in Sherman Island. Seals can adopt turtles (but first they have to pass a quiz to see if they'll take care of a turtle well). The language they speak is called Arf or Arf-arf (most commonly known as Sealglish or Arfnish or Sealspañól or Arfspanól). The staff member seals get to turn into turtles. All of the seals in the game are abnormally as tall as most humans.