Which animals do not have a back bone?

Answer 1

By definition, no invertebrates have backbones.

If it has a backbone, it's classified as a vertebrate.

(By definition, any animal having a backbone or spinal column is a vertebrate. Any other animal is automatically classified as an invertebrate.)

Answer 2

Nearly 99% of all animals do not have backbones. Such as: sponges, comb jellies, jelly fish, nematodes, flat worms, earthworms, snails, clams, insects, crustaceans, starfish, etc. The only animals that do have a backbone are: fish, amphibians, reptiles, birds, and mammals.

Answer 3

Here are the animals that doesn't have a backbone : Leech Butterfly Spider Housefly Millipede Starfish Snail Earthworm

Answer 4

An invertebrate. Creatures like molluscs, crustaceans (shrimp, crayfish, crabs) etc.

Answer 5

These are invertebrates. An example would be a Grasshopper or Butterfly

Answer 6

Invertebrates

Answer 7

jellyfish