This document discusses polymorphism in siphonophores, which are hydrozoan organisms. Siphonophores exhibit polymorphism, where different individuals take on specialized forms and functions. Some of the polymorphic forms seen in siphonophores include cormidia, siphonoglyphs, tasters, bracts, pneumatophores, trichters, and gonophores. The document poses questions about what polymorphism is, why it developed in siphonophores, and the different polymorphic forms among their polyps and medusae.

1. Polymorphism in
Siphonophora
Md Ekramuddin

2. Siphonophora-hydrozoan Order
Phylum Cnidaria
Class
Hydrozoa
Order Siphonophora
Class
Scyphozoa
Class
Anthozoa

3. Pennatularia sp

4. Velella sp

5. Physalia sp

17. Questions
• What is polymorphism?Why this is developed
among the siphonophores?
• Define polymorphism. Write down different
polymorphic forms of Polyp/Medusa among
the siphonophores?
• Write note on- cormidium, siphonoglyph,
tasters, bract, pneumatophore, trichter,
gonophore,swimming bell, difference
between caste and zooid.

18. Thank you