Chordate of the three subdivisions of chordates, all have distinct skulls. They include the hagfish, which have no vertebrae. Michael J. Benton commented that "craniates are characterized by their heads, just as chordates, or possibly all deuterostomes, are by their tails". Most craniates are vertebrates, in which the notochord is replaced by the vertebral column. These consist of a series of bony or cartilaginous cylindrical vertebrae, generally with neural arches that protect the spinal cord, and with projections that link the vertebrae. However hagfish have incomplete braincases and no vertebrae, and are therefore not regarded as vertebrates, but as members of
Animals in Islam from any animal is prohibited. Islam strongly warns people against committing such an act. Muslims may not cut the forelock, mane, or tail of a horse, because it is believed there is goodness in its forelock; its mane provides it warmth; and it swats insects away with its tail. Muslims are not allowed to commit some acts like castration and interbreeding animals. Muhammad forbade people from castrating animals. From the Muslim perspective, Muslims are not allowed to harass and misuse animals, which even includes actions like snatching a leaf from an ant's mouth. Muslims have no right to brand animals,