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Exclusively marine animals are found in phyla

Option: 1

Echinodermata and Ctenophora


Option: 2

Echinodermata and Annelids


Option: 3

Ctenophora and Sponges


Option: 4

Echinodermata and Mollusca


Answers (1)

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Phylum Echinodermata

  • The term ‘Echinodermata’ is obtained from the Greek words echinos meaning spiny and dermos meaning skin. 
  • This phylum includes sea stars, sea cucumbers, sea urchins, sand dollars, and brittle stars.
  • These are exclusively marine.
  • These are triploblastic with a true coelom.
  • They bear resemblance to chordates in showing radial cleavage in embryo and development of blastopore that forms anus.

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Echinoderms and ctenophores are exclusively marine animals.

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sudhir.kumar

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