mollusca n.
Skip this Video
Loading SlideShow in 5 Seconds..
Mollusca PowerPoint Presentation
Download Presentation

Loading in 2 Seconds...

play fullscreen
1 / 13

Mollusca - PowerPoint PPT Presentation

  • Uploaded on

Mollusca. By: Miranda & Ashley :]. Mollusca Characteristics. Bilaterally symmetrical. Body has more than two cell layers, tissues and organs. Body without cavity. Body possesses a through gut with mouth and anus.

I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
Download Presentation


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.

- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript


By: Miranda & Ashley :]

mollusca characteristics
Mollusca Characteristics
  • Bilaterally symmetrical.
  • Body has more than two cell layers, tissues and organs.
  • Body without cavity.
  • Body possesses a through gut with mouth and anus.
  • Body monomeric and highly variable in form, may possess a dorsal or lateral shells of protein and calcareous spicules.
  • Has a nervous system with a circum-oesophagal ring, ganglia and paired nerve chords.

Ramel, Gordon. "The Molluscs (Phylum Mollusca)." The Earth Life Web. Web. 04 Apr. 2011. <>.

mollusk facts
Mollusk Facts
  • Mollusks eat a wide range of material.
  • Mollusks live in most environments.
  • After the Arthropods the Molluscs are the most successful of the animal phyla in terms of numbers of species.
  • There are about 110,000 species known to science most of which are marine.
  • Bivalves have shells made up of 2 asymmetrically rounded halves called valves that are mirror images of each other
  • They need fresh water to breathe, reproduce and eat
  • Most species burrow into mud and sand.
  • Most bivalves eat bits of plants and animals floating in the water.
  • A few species collect food from the bottom
  • Others absorb nutrients directly into their bodies

Bivalves: Bivalvia - Physical Characteristics, Behavior And Reproduction, Bivalves And People, Conservation Status, Black-lipped Pearl Oyster (pinctada Margaritifera): Species Accounts - GEOGRAPHIC RANGE, HABITAT, DIET

giant clam bivalvia

Giant Clam(Bivalvia)




Order: incertae sedis



Species:T. gigas

giant clam
Giant Clam
  • The Giant Clam is the largest immobile mollusc in the world, reaching up to 6 feet in length.
  • Once a Giant Clam settles somewhere it stays there for the rest of its life.
  • They live in tropical waters, and feed on plant and animal matter.
  • Giant clams are eaten by humans
  • Giant clams generally have bad interaction with humans because humans decrease the clam population with hunting. :]
  • Human pollution affects Giant Clams because humans pollute the water they live in
  • They are endangered
  • They are hunted by humans for a muscle that is eaten in many countries.
  • Marine Parks throughout the world are working to protect clams.
  • Clam Video :]
  • "Giant Clam." True Wild Life True Wild Life. Web. 25 Mar. 2011.Source
  • Gastropods are the largest variety of mollusks
  • There are over 90,000 different types of Gastropods.
  • They occupy every habitat on earth
  • It is the only class to contain species that have ventured permanently on to land.
  • Over 15,000 fossil forms have been described and over 90,000 species exist today
  • Gastropods exhibit the least change from the ancestral molluscan plan of all the molluscs.
g atlanticus
G. Atlanticus







Common Name: Nudibranch

glaucus atlanticus
Glaucus Atlanticus
  • A species of medium-sized blue sea slug
  • They are between 5 and 8 centimeters in length
  • They live Tropical waters
  • They prey on other larger pelagic organisms like the dangerously venomous Portuguese man o’ war
  • If there is no food around, they will resort to cannibalism and eat other G. Atlanticus
  • They float upside down
  • They are not eaten by humans
  • Human pollution affects the water they live in
  • They are not endangered
  • Humans havent really taken any steps to protect them
  • They are not hunted by humans
  • Human interaction is neutral.
  • Cephalopods are found in all of the worlds oceans
  • Cephalopods have 3 hearts, and blue blood
  • All species of cephalopods are marine
  • There are 800 living types
  • They grow fast, reproduce, and die over a short period of time.
  • They were once one of the dominant life forms of the oceans.
giant squaid architeuthis dux
Giant SquaidArchiteuthis dux

Kingdom: Animalia

Phylum: Mollusca

Class: Cephalopoda

Order: Teuthida

Suborder: Oegopsina

Family: Architeuthidae

Genus: Architeuthis

Species: Architeuthis dux

Geographic Range

giant squid facts
Giant Squid Facts
  • Giant squids can grow to over 26 feet.
  • Giant squid eat hoki fish (the same fish used in McDonalds filet o fish sandwiches. Yum:]), and shrimp
  • They are the largest invertebrate on earth
  • They have the largest eyes in the animal kingdom, measuring 10 inches in diameter 
  • They move with fins, and use their funnel as a propulsion system, drawing water main part of the body, and forcing it out the back
  • Giant squid carcasses have been found in all the worlds oceans
  • Giant squids are usually not eaten by humans, but it porbably is possible.
  • Because they live where humans rarely go, its hard to tell whether they are endangered or not.
  • There are no protection efforts for the giant squid
Resources :]
  • Myers, P., R. Espinosa, C. S. Parr, T. Jones, G. S. Hammond, and T. A. Dewey. 2008. The Animal Diversity Web (online). Accessed March 25, 2011 at
  • Postlethwait, John H., and Janet L. Hopson. Modern Biology. Orlando: Holt, Rinehart and Winston, 2006. Print.