The radula are rasping, ribbon-like teeth that mollusks use to either scrape algae off of surfaces, like rocks, or use them to drill into the hard exterior of their chosen prey.
For example, most if not all snails will use their radula to scrape algae from rocks.
In the mean time, mollusks like conch will drill holes into the shells of clams and oysters (also mollusks) and then eat their prey through the hole they made.
Organisms include Land and Sea Snails, Sluds, and Nudibranchs!
This phylum includes organisms with one shell (and sometimes no shell such as sea slugs.)
Gastropods have a broad, muscular foot on the ventral side of the body.
Shells show RADIAL TORSION, which gives the shell its spiral shape.
Organisms include oysters, scallops, clams, and mussels.
Bivalves have gills used for breathing, but can also use them to feed! They will extend them out to "screen," or check, the water for microorganisms and algae to munch on.
Bivalves are mostly sessile, but can use their foot to move away from predators and even "swim" when they quickly open and close their shells.
Oysters are bivalves that can create pearls!
Cephalo means head. Poda means foot. This means that these organisms have a combination head and foot! Since their body looks like it is their entire head, they were deemed "head foot" or CEPHALOPODA!
Class Cephalopoda includes Cuttlefish, Squid, Ammonites, Nautilus, and Octopus.
These organisms are HIGHLY mobile. They can move very quickly thanks to their ability to use jet propulsion. Cephalopods can easily pull water in through a siphon and push it back out to propel themselves.
These organisms lost their shells so that they could gain stronger muscles to swim faster. The shell is now internal and, in some species, is found as a "pen."
These organisms are incredibly intelligent with excellent sense, including the eyes.
These organisms can use ink as a defense mechanism.
These organisms have the ability to change their texture, size, and color thanks to chromatophores.