mammalia
Horse
They belong in Chordata
Fish
No, a sea horse is not an invertebrate. They belong to the phylum chordata (meaning they have a spinal chord.)
Butterflies belong to the Phyla or Phylum Arthropoda.
Platyhelminthes is the phyla of the marine flatworm.
Chordata
Echinodermata
They belong to the phyla Platyhelminthes, along with the flatworms. Members in this phyla are acoelomates.
it belongs to mullusks.
Phylum Chlorophyta
Phylum Arthropoda.