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Molluscs are one of the largest most successful groups of animals. The term mollusca(Latin for "soft") refers to animals soft bodies, which in most cases re covered by a shell made of calcium carbonate.
Molluscs are represented by familiar animals such as snails, clams, octopuses and squid (like Squidward!)
Gastropods (class Gastropoda; gastro meaning "stomach" and poda meaning "foot") exhibit tremendous amount of diversity. Most have shells but some of them have lost them. They exhibit a wide variety of feeding styles. there are herbivores, carnivores, scavengers,deposit feeders and suspension feeders.
The sexes are separate in most gastropods. Most species exhibit internal fertilization.
Bivalves are molluscs that have shells divided into two jointed halves called valves. The group includes clams, oysters, mussels scallops and shipworms.
(Below is a picture of a giant clam.) The majority of bivalves sexes are separate and during reproduction the sperm and eggs are shed into the water column.
Cephalopods are molluscs such as the octopus, squid and cuttlefish. The term cephalopod means "head-footed" and refers to the animals foot which is modified into a head-like structure.
There are two main groups of cephalopods. One group nautiloids is covered by a shell. The other group is the coleoids which includes squids, ocotopods and cuttlefis
h. These animals do not have a shell.
h. These animals do not have a shell.The Blue Ringed octopus advertises that it is toxic by its bright blue rings.
This is a picture of a Nautilus
Cephalopods can communicate with each other through movements of their arms and bodies and by color changes. Here is a video about how cuttlefish are masters of camouflage. http://www.youtube.com/watch?v=mW4PbW893ik
Cephalopods are carnivores . Their prey is located with highly developed eyes and captured by the tentacles. They have a powerful pair of beak-like jaws in their oral cavity.
This video is called Shark vs. Octopus. Can you guess who wins? http://www.youtube.com/watch?v=p9A-oxUMAy8
"Sea" you real soon!
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