Because Its body structure has segments.
A crayfish has segments, which are sections of a body that are separated by a crease, so it might be determined as segmented because it has only two so it may be classified but it might not. Worms have many segments.
Its tail or abdomen is segmented
First of all, only the cephalothorax is inflexible. The tail is flexible, and if you look at it closely, it is clearly segmented. The cephalothorax is actually also segmented internally, but is masked by the shell, called a carapace.
Crayfish are classified as arthropods, because of their characteristic segmented bodies, chitinous exoskeleton, and joint appendages.
Crayfishs have 2 body segments: cephalothorax and abdomen.
In the question, what does "it" refer to?
The animal with a segmented body is called an arthropod.
Crayfish, which are crustaceans, differ from annelids in several key ways: firstly, crayfish have an exoskeleton made of chitin, while annelids possess a segmented body covered by a moist cuticle. Secondly, crayfish exhibit jointed appendages for movement, whereas annelids have soft, segmented bodies with bristles (setae) for locomotion. Finally, crayfish have a complex nervous system with a brain and specialized sense organs, while annelids have a simpler nervous system with a nerve cord and ganglia.
Crayfish are members of the crustacean family.
Yes
The general consensus among evolutionists is that fish evolved from segmented worms.
segmented worms