The document describes the blue-ringed octopus, a small and highly venomous cephalopod that lives in coral reefs from Japan to Australia. It belongs to the genus Hapalochlaena and includes four species, most notably Hapalochlaena nierstraszi. The blue-ringed octopus is one of the most poisonous animals in the world and is characterized by its distinctive blue rings that appear when threatened.

2. Characteristics
• Phylum: Mollusks Cephalopods
• Order: Octopods
• Name Commonly: “Blue – Rieged
Octopus”

3. • Includes four species of
octopuses:
• Hapalochlaena lanulata
• Hapalochlaena muculosa
• Hapalochlaena fasciata
• **Hapalochlaena nierstraszi

4. • One of the most poisonous
animals in the world

5. • Characteristic blue rings

6. Feeding

7. Anatomy

8. Anatomy

9. Distribution
These octopuses inhabit the coral reefs of the Indian and Pacific
ocean from Japan to Australia.

10. Reproduction
The male deposits sperm packets with the hectocotylus under the mantle
of the female

12. The female will deposit only 50 eggs
She will care them until they hatch after six
months

13. The new generation of blue ringed octopus
is ready to breed the following year.

14. Thank you for your attention!!!