Answer:
goldfish
Step-by-step explanation:
There are many organism which shows some relative character with other organisms.
Kingsnakes and goldfish has some similarities that makes them closest relative. They both are cold blooded and have common phylum that is Chordata. They both are vertebrates and their spinal cord is enclosed and protected by series of bones.
some species of kingsnakes such as Mexican milk snake and red milk snake and goldfish have posses coloration and patterning which protect them from invasion of other organisms. They both have scales in their body, though the scales are not homologous.
Hence, the correct option is goldfish.