My organism is in the phylum ___________ and class __________.

An organism that is in phylum ___________ but not in class _________ is ______________.

fill in the blank

1 answer

My organism is in the phylum Chordata and class Mammalia.
An organism that is in phylum Chordata but not in class Mammalia is a fish (class Actinopterygii or Sarcopterygii).