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Mollusc Classes
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Class Gastropoda Means “stomach foot”
Largest class- 80% of all molluscs Sedentary because of their heavy shell Examples: Snails, slugs, conchs, sea hares, sea butterflies, limpets, whelks and periwinkles snails cone snail giant African snail
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Snails
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Snails
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Limpets
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Limpets
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Slugs
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Whelks
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Whelks
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Conchs
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Conchs
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Conchs
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Periwinkles
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Periwinkles
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Sea slugs
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Sea slugs
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Sea hares
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Sea hare
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Sea butterfly
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Nudibranchs
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Nudibranchs
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Class Bivalvia Means “two shelled” Have no head or radula
Shells are made of calcium carbonate All live in water Examples: mussels, clams, scallops, oysters
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Clams
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Mussels
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Scallops
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Scallops
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Oysters
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Oysters
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Zebra mussels (Lake Mead)
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Preventing Mussels in Idaho
zebra muscles in idaho
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Class Cephalopoda Means “head-foot” Most complex class All are marine
All are predators Foot has adapted tentacles Release ink in defense of predators Have color changing cells for camouflage Examples: squid, octopus, nautilus, cuttlefish Chromatophores: cells that help the organism change color rapidly
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Giant Squid
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Slash marks from Giant Squid
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Octopuses
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Octopuses
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Octopuses
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Blue Ringed Octopus The most venous octopus.
This small mollusc lives in warm, shallow reefs off the coast of Australia, new Guinea, Indonesia and the Philippines. It has a life span of about one and a half years.
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Blue Ringed Octopus It is said that the venom of this octopus could kill 26 adults in just a few minutes. There is no antivenin for treatment. Fortunately, these octopuses do not attack humans. Injury typically occurs when a blue-ringed octopus is stepped on or picked up.
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Nautiluses
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Nautiluses
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Nautiluses
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Cuttlefishes
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Cuttlefishes
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Cuttlefishes
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true facts about the octopus
Cephalopods octopus hiding Kings of Camo Nautilus Cuttlefish deadly animals true facts about the octopus
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Review
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Review
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