Mollusc Classes.

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Presentation transcript:

Mollusc Classes

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

Snails

Snails

Limpets

Limpets

Slugs

Whelks

Whelks

Conchs

Conchs

Conchs

Periwinkles

Periwinkles

Sea slugs

Sea slugs

Sea hares

Sea hare

Sea butterfly

Nudibranchs

Nudibranchs

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

Clams

Mussels

Scallops

Scallops

Oysters

Oysters

Zebra mussels (Lake Mead)

Preventing Mussels in Idaho zebra muscles in idaho

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

Giant Squid

Slash marks from Giant Squid

Octopuses

Octopuses

Octopuses

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.

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.

Nautiluses

Nautiluses

Nautiluses

Cuttlefishes

Cuttlefishes

Cuttlefishes

true facts about the octopus Cephalopods octopus hiding Kings of Camo Nautilus Cuttlefish deadly animals true facts about the octopus

Review

Review

Review

Review

Review

Review