the marine biome marine invertebrates: mollusca. clams mussels snails octopus squid
TRANSCRIPT
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The Marine BiomeMarine Invertebrates:Mollusca
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Mollusca
•Clams•Mussels•Snails•Octopus•Squid
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Body Type
•Bilateral symmetry
•Soft bodied animals, most have a hard protective shell▫Some classified as bivalves
•Mantle covers the body▫Protective tissue
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Body Type
•Most have eyes
•Octopi have well developed brains
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Motion
•Snails and Bivalves have a muscular foot
•Octopi have one foot divided into tentacles
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Food
•Snails are scavengers▫Scrape food off ground
•Bivalves are herbivores▫filter feeders
•Octopi and squid are carnivores▫shell fish and small fish
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Food
•Octopi are eaten by sharks▫Can eject a dark ink which confuses a
predator and allows the octopus to get away
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Importance
•For the Biome: ▫Some clean the ocean floor
•For Humans: ▫Food ▫Medicines▫Jewellery
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Examples
•Giant Clam
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Examples
•Flame Scallop
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Examples
•Cone Snail
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Examples
•Sea Slug
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Examples
•Squid
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Examples
•Blue Ringed Octopus
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Examples
•Pacific Octopus
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Videos
•Giant Pacific Octopus
•Mimic Octopus
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Interesting Fact•Cone shells are marine
snails. They prey upon other marine organisms, immobilizing them with unique venoms.
• There have been 30 recorded cases of human envenomation by fish-eating cone shells, in some cases fatal. Upon investigation it was found that the toxins in cone shell venoms possess pharmacological qualities that make them valuable tools in medical research.