Cephalopods Tentacles grow from head shell varies throughout the class SUPPORT STRUCTURE Nautilus light chambered shell Squid thin internal shell Cuttlefish thick bonelike structure ID: 530685
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CephalopodsSlide2
Cephalopods
Tentacles grow from head, shell varies throughout the classSlide3
SUPPORT STRUCTURE
Nautilus
– light chambered shell
Squid
– thin internal shell
Cuttlefish
– thick bone-like structure
Octopus
– no support structureSlide4
Cuttlefish
Squid-like, fast swimmersSlide5
CuttlefishSlide6
CuttlefishSlide7
CuttlefishSlide8
Octopus
Rarely swims, crawls on 8 arms
Lives in holes, crevices, and burrows
Nocturnal hunters, squirt ink as defenseSlide9
Giant Pacific OctopusSlide10Slide11
Squid
Very active swimmers
Commonly found in schools
Aggressive predatorsSlide12
Arrow squidSlide13
Opalescent SquidSlide14
Nautilus
Slow swimmers
Can have up to 90 armsSlide15
Chambered NautilusSlide16
CHAMBERED NAUTILUSSlide17
Intelligence
Octopus is the smartest known invertebrate – can learn from past experiencesSlide18
Size
Giant squid is the largest living invertebrate – up to 50 feet longSlide19Slide20
In September of 2005 Japanese scientists shot the first photos ever taken of a living giant squid in its natural environment – Northern Pacific Ocean.
Measured roughly 25 feet longSlide21Slide22
Mouth
Located in the center of the tentacles, have a beak, venomous glands,
radula
Slide23Slide24
Ringed octopus has venom that can be fatal to humansSlide25
Siphon
Propels them, runs water and oxygen over gills, eliminates wastes, releases gametes, releases inkSlide26Slide27
Chambered nautilus
Can fill or empty their chambers with water to control buoyancy