They are mammals, so of course they have backbones.
Yes, manatees belong to the Kingdom - Animalia, and the Phylum - Chordata (making them chordates). All chordates have internal backbones (vertebrae); therefore a manatee is a vertebrate.
they are both mammals
No there is more with backbones
No backbones
Pigs do have backbones.
it has 2 backbones
Manatees are consumers.
All snakes have backbones.
all fishes have backbones
no they don't have backbones
The backbones are part of the skeleton.
no myriapods don't have backbones