Every organism has a chromosome number that is characteristic of its particular species.
Different species have different chromosome numbers.
For example, humans have 46, a dog has 78 and a goldfish has 94. You will also occasionally find two species with the same listed chromosome number. For example, both humans and guppies both have 46 chromosomes. This doesn't mean guppies and humans are genetically identical. Although we have the same number of chromosomes the type and arrangement of genes on the chromosomes are different for the two organisms.