In the dichotomous key below what characteristics used to help identify the fish? How does the dichotomous help you identify the fish?

ifif you look at the fish you could see what the difference is because some of them are reptiles or they're just amphibians but in the dichotomous key you can tell by looking at them that you can know what fish goes into the dichotomous key
Answer:
First you have to see the fish and you can instantly see the difference between them.