which phylums are exclusively marine
a) porifera and coelentrata
b)coelentrata and echinoderms
c) echinoderms and protochordata
d) echinoderms and porifera
a) porifera and coelentrata
b)coelentrata and echinoderms
c) echinoderms and protochordata
d) echinoderms and porifera
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I think Porifera and Echinoderms
Option d is correct
I'm sure.
if you like my answer mark me as brainliest