Scientists classify fish, amphibians, reptiles, birds, and mammals together within one group - share similar characteristics such as body plane, backbone, and germ layers.
Vertebrates
The following group of organisms that are fish, amphibians, reptiles, birds, and mammals is all called vertebrates and grouped under the phylum Chordata as they share common body plans and various characteristics.
They all have a backbone or vertebra and have triploblastic with three primary germ layers, bilateral symmetrical organisms that have the organ system level of body organization. These organisms have a notochord, tubular nerve cord, and pharyngeal gill slits at any stage of their life.
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