Mollusks
Creatures with soft squishy bodies, often making a shell for protection.
What is a mollusk?
What makes a mollusk a bivalve?
Two shell halves
Gastropod means ____
Gastro = stomach
Pod = foot
Stomach foot animals
Cephalopod means _____
Cephal = head
pod - foot
Head foot animals
When a grain of sand gets inside a bivalve shell and the mantle secretes nacre.
What is a pearl?
This helps a bivalve to move.
What is a foot?
Bivalves are hinged at _______
What is the umbo? (top of the shell)
A popular gastropod with a heavy shell that has a pearly flared lip and a special notch that it's eyes, on stalks, can protrude from.
What is a conch? (Page 149)
Octopus have eight and squid and cuttlefish have ten.
How many arms or tentacles do these have?
Snails have this especially good sense.
What is their sense of smell?
The organ that makes the shell.
What is the mantle?
A bivalve breathes with these.
What are gills?
The thick pad that closes, like a door, over the hole in the gastropod's shell.
What is the operculum? (page 148)
This is the only hard part of an octopus.
What is a beak?
Name three mollusks with shells
Oysters, clams, scallops, mussels, conch, snails, moon snails, whelks ...
What is the main predator of sea snails?
Sea Snails (page141)
The tubes that bring in water for oxygen and food, and that expel waste.
What are siphon tubes?
The jagged organ with many denticles, that can drill a hole in a shell.
What is the radula? (page 149)
Four unique characteristics of an octopus.
Chromatophores to change color instantly.
Thick, dark ink to squirt to confuse a predator.
Extremely well developed eyes to see far away.
Taste with their suction cups
Jet propulsion with their hyponome
A separate brain in each arm
About 15,000 different species
How many species of clams are there in the world? (page 144)
Name three mollusks that cling to rocks, piers, or other shelled animals.
What are mussels, oysters, slipper shells, limpets, or abalones?
The bivalve that can swim by clapping its shells together.
The scallop
Its name means "naked gills"; it is frilly, colorful, some glow in the dark, and it eats lots of soft corals, sea anemones, and sponges.
What is a nudibranch?
When they are not camouflaged, octopuses express feelings and emotions this way.
Why do octopuses change color?
The tough fibers that mussels use to attach, that scientists cannot duplicate.
What are byssal threads? (page 145)