Notochord present Dorsal hollow nerve cord persists throughout the life, Pharyngeal gill clefts, Presence of ventral heart, Post anal tail, They are bilateral, symmetrical, triploblastic, eucoelomates & metamerically segmented animals, Presence of hepatic portal system, Eyes derived from brain etc.. are the salient features of phylum chordata.
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hope it helped ^_^
Nice answer @KIMMUS
My pleasure #Angela

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1) Ventral heart
2) Post anal tail
3) Notochord present
4) Pharyngeal gill slits
5) Hepatic portal system
6) Eyes derived from brain
7) Nerve cord present
8) bilaterally symmetrical body

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