COURSE I - FIRST SEMESTER

PHYLUM COELENTERATA

Needle cell bearing animalsMulticellular, radially symmetrical, diploblastic

Prof. S D Rathod

Needle cell

Stinging cell impact

Polymorphism

Class – Hydrozoa

Polyp and medusa forms Example - Obelia

Class – Scyphozoa

solitary and free living marine medusoid forms

mesogloea is very thick which make them a jelly like so jelly fishes

Four chambered stomach Example - Aurelia

Aurelia (jelly fish)

Class – Anthozoa

• Anthozoans are marine polyp forms.• They are solitary or colonial.• gastrovascular cavity has vertical septa called as

mesenteries. These are called corals

Sea anemone

Corals

Brain coral Sea fan Fungoid

Stag horn coral - Madrepora

Small polyps in corals

Coral reefs

Great barrier reef

Coral reef biodiversity

Richest biodiversity on the globe

Thank you