A toothless mammal begging with an A is an Anteater/ Aardvark
edentata
The Echidna is toothless
panther
Dolphin
If sloths do have teeth they are verry small because they are a part of the toothless mammal family Their molars are quite large allowing them to chew leaves and they are toothless in front to enable them to strip leaves from limbs.
nobody knows
Toothless
toothless
Plankton
His dragon is called Toothless and there are several others mentioned in the books/film, but Toothless is Hiccup's only dragon in both.
Because when he first sees him, he doesn't think he has teeth
Toothless