No goldfish have bellybuttons. A belly button is just a scar from where we were attached to our mother. Since fish are hatched from eggs, it doesn't apply to them.
Yes, they do eat bellybuttons. It's their favorite food!
Dolphins are placental mammals. All placental mammals have bellybuttons of some kind.
Cats are placental mammals, and all placental mammals have bellybuttons of some sort.
Penguins are hatched from eggs, not born through live birth -- which would be the only reason why a penguin would have a bellybutton -- but because they aren't, they don't.
As a matter of fact, dolphins do have bellybuttons. All mammals have them because that is where their umbilical cord was connected.
Yes.
no
Umm, no ;)
Mammals, yes.
James baldry
no pigs dont have belly buttons