Question

Are jellyfish triploblastic?

Answer 1

Triploblastic organisms

1. Organisms that have developed from three embryonic germ layers are called triploblastic.
2. The three germ layers are ectoderm, mesoderm, and endoderm.
3. All bilaterally symmetrical animals in phylum Platyhelminthes, Annelids, Arthropods, Molluscs, Echinoderms, and Chordates are triploblastic.

Diploblastic organisms

1. Organisms that develop from only two embryonic germ layers, ectoderm and endoderm are called diploblastic.
2. Coelenterates (cnidaria) and Ctenophora are examples of diploblastic organisms.

Jellyfish

1. Jellyfish are mostly marine free-swimming animals that have trailing tentacles and umbrella-shaped bells. A few may be anchored.
2. They belong to the phylum Coelenterates and have two layers of cells arranged in the outer ectoderm and inner endoderm.
3. Radial symmetry is a characteristic feature of coelenterates like jellyfish.
4. Jellyfish are diploblastic organisms, they are not triploblastic.