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1. Ramakrishna Mission Vivekananda Centenary College
Rahara,Kolkata-700118
Name-Soumyadeep Saha Mondal
Roll No-508
Department of Zoology (Hons)
Year-2023
1ST SEMESTER
Powerpoint Presentation on study of any two Non-
chordate animals(one from Coelomates & other from
Non-coelomates)

2. A COELOMATE ANIMAL
GIANT PACIFIC OCTOPUS
(Enteroctopus dofleini)
Giant Pacific octopuses only live an average
four to five years in the wild,yet they are still
considered one of the longest-living octopus
species.
SYSTEMATIC POSITION-
Kingdom Animalia
Phylum Mollusca
Class Cephalopoda.

3. MORPHOLOGY OF GIANT PACIFIC
OCTOPUS
1. The giant Pacific octopus is usually
reddish-brown in color.
2. The average size is 16 feet (4.9 m) in
length from the top of its body
(mantle) to the tip of its arms.
3. This is the largest species of octopus
with a record size of 181 kg and a 30
ft. (7.6 m) arm span.

4. LOCOMOTION OF GIANT PACIFIC OCTOPUS
Jet propulsion is the key manner of their locomotion.
the giant Pacific octopus swims head first,which
sometimes makes it look like it's swimming backward.
The octopus fills its mantle with water.The muscles of the
mantle then contract to force water through a narrower
opening called a siphon,creating movement.

5. DIGESTIVE SYSTEM OF GIANT PACIFIC OCTOPUS
1. In the giant Pacific octopus the digestive enzymes do
not come from the wall of the stomach but are
produced by the liver and introduced into the stomach
through ducts.
2. These enzymes cause the food to break down into small
molecules that the blood absorbs and transports back
to the liver.

6. RESPIRATORY SYSTEM OF GIANT PACIFIC OCTOPUS
1. The respiratory system of an octopus consists of two
gills, which are responsible for extracting oxygen from
the water, and a network of blood vessels that
transport the oxygen to the rest of the body.
2. The gills are located on either side of the octopus's
head and are protected by a hard plate called the
operculum.

7. EXCRETORY SYSTEM OF GIANT PACIFIC
The giant Pacific octopus excretes waste
through its siphon,a funnel-like hole
on the side of its mantle.As a result,its
poop comes out as a long,noodle-like
strand.

9. REPRODUCTION IN GIANT PACIFIC OCTOPUS
1. Female giant Pacific octopus can lay between 18,000 to
100,000 eggs.
2. The eggs are placed on rocks or sandy bottoms at depths less
than 164 feet (50 m).She will protect them for about six
months from other animals,such as sea stars and
crabs.During this time,she will not eat.
3. The giant Pacific octopus reproduces in the fall.Individuals
usually will mate only once.After mating,the male will move
into deep water and die.The female will die after her eggs
hatch.

10. NERVOUS SYSTEM OF GIANT PACIFIC OCTOPUS
1. They have axial nerve cords down each arm sending
information to and from the brains.
2. All of these axial nerve cords are connected by a
circular nerve cord at the base of the mantle.
3. Their suckers have individual ganglia that connects it
to the axial nerve cord.
4. Their brains are comprised of 64 lobes and are
protected by cartilaginous craniums

11. AN ACOELOMATE ANIMAL
CANNONBALL OR CABBAGEHEAD JELLYFISH
(Stomolophus meleagris)
The cannonball jellyfish
(Stomolophus meleagris),also known
as the cabbagehead jellyfish,is a
species of jellyfish
SYSTEMATIC POSITION-
Kingdom Animalia
Phylum Cnidaria
Class Scyphozoa

12. MORPHOLOGY OF CANNONBALL JELLYFISH
Its common name derives from its similarity to a cannonball in shape
and size.Its dome-shaped bell can reach 25 cm (10 in) in diameter.The
rim is often colored with brown pigment.Blue Cannonball Jellyfish are
energetic swimmers with a pretty appearance.Stunningly bright blue
colour bell, sometimes with cream or dark colour markings especially
around the edge of the bell.

13. LOCOMOTION OF CANNONBALL JELLYFISH
Cannonball jellyfish move and propel through the water by
pumping water with their powerful bell,passing it across its
oral arms.However,this mobility is limited.

14. DIGESTIVE SYSTEM OF CANNONBALL JELLYFISH
1. Jellyfish do not have a specialized digestive system.Food goes into
the Jellyfish through the mouth which is found in the middle of the
bell.Then,the food is trapped in the gastrovascular cavity and the
nutrients are absorbed by the gastrodermis.
2. The waste products also leave through the mouth.

15. Cannonball Jellyfish have no well
developed
digestive,Respiratory,Nervous &
excretory system(follows diffusion
process for excretion).

16. Cannonball Jellyfish stings are fairly common problems
for people swimming or diving in oceans.The long
tentacles trailing from the jellyfish can inject venom
from thousands of microscopic barbed stingers.
Most often Cannonball jellyfish stings cause instant
pain and inflamed marks on the skin.Some stings may
cause more whole-body (systemic) illness.And in rare
cases they're life-threatening.
AN AMAZING FACT ABOUT CANNONBALL JELLYFISH

17. THANK YOU