Notochord is present throughout the life in
Fish
Leech
Amphioxus
Amphibia
Phylum Cephalochordata - Characteristics Features -
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The animals of Cephalochordata have notochord, dorsal hollow nerve cord, pharyngeal gill slits and postanal tail in the adult stage. The notochord is present in the head region. Hence, their name is cephalochordata.