Fictional Manatees/Armadillos/Anteaters/Sloths/Other Animals

Manatees are sirenians which are fully aquatic herbivourous mammals and are often mistaken for "mermaids". Armadillos, anteaters and sloths are xenarthrans which are placental mammals and their vertebral joints have extra articulations and ischiosacral fusion. Males have internal testicles. They also have the lowest metabolic rates among therians. This list also includes other animals. How many do you know of?