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Mollusks. Overview. Mollusks Live in Fresh-Water, Saltwater, and Terrestrial Habitats They are one of the most diverse groups having over 150,000 known species They are Invertebrates Reproduce Sexually Move using locomotion which consists of the mantle

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Mollusks

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Mollusks


Overview

  • Mollusks Live in Fresh-Water, Saltwater, and Terrestrial Habitats

  • They are one of the most diverse groups having over 150,000 known species

  • They are Invertebrates

  • Reproduce Sexually

  • Move using locomotion which consists of the mantle

  • They Mantle also assists in Digestion using secretion

  • They use the Radula to scrape for food

  • All mollusks move using a foot

  • The Four groups of Mollusks are Chitons, gastropods, and Bivalves and Squid


Chitons

  • Characterized by their segmented shell

  • Usually their habitat consists of rocky shorelines, and shelly ocean bottoms everywhere in the ocean

  • Body is Symmetrical

  • Covered by 8 plates

  • Protects itself by rolling up into a ball

  • Eat seaweed and algae


CHITONS


Gastropods

  • Consist of Snails, Slugs, and Welks

  • Most of the Gastropod family are herbivores, however, some gastropods are carnivores

  • Compared to Chitons, Gastropods are characterized by their gills and other body parts

  • Their shell is either internal or external

  • They have a torted body


Gastropods


Bivalve

  • Characterized by two pressing shells

  • Joined by a dorsal end called a ligament

  • The shell is compressed

  • Most bivalves are filter eaters by some are carnivorous

  • They are found from seashore to deep-sea habitats

  • They cover and dig themselves in mud and sand for protection and or to live


Bivalves


Squid

  • Larger Head and a larger brain

  • Interior skeleton

  • Two Lateral Fins

  • Around the mouth there are 8 suck bearing arms, two contractile tentacles that are longer than the rest of the arms

  • The fastest invertebrate

  • Feed on fish by grabbing them with their tentacles, and eating them like a bird tears flesh


Squid


Mollusk Video

  • http://video.nationalgeographic.com/video/player/kids/animals-pets-kids/invertebrates-kids/nudibranch-kids.html


Cited Sources

  • http://paleo.cortland.edu/tutorial/Ceph&Gast/gastropods.htm

  • http://animaldiversity.ummz.umich.edu/site/accounts/information/Bivalvia.html

  • http://animals.jrank.org/pages/1908/Bivalves-Bivalvia.html

  • http://encarta.msn.com/encyclopedia_761552165/Squid.html

  • http://www.allsands.com/science/animals/squidinformatio_yrw_gn.htm

  • http://video.nationalgeographic.com/video/player/kids/animals-pets-kids/invertebrates-kids/nudibranch-kids.html


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