Anatomy
Cephalopods move by expelling water through this structure.
What is a siphon (or funnel)
This cephalopod is famous for its ability to change color and texture instantly.
What is an octopus
Like all mollusks, scaphopods and cephalopods have this soft body part used for locomotion and manipulation.
What is a foot
Cephalopods differ from most other mollusks by having this well-developed body system used for learning and memory.
What is the nervous system (or brain)
This eight-armed cephalopod can squeeze through tiny holes and is famous for its intelligence.
What is an octopus
Scaphopods have this long, tubular structure instead of a flat or coiled shell.
What is a tusk-shaped shell
Scaphopods live buried in this part of the marine environment.
What is sediment (or the seafloor)
These common mollusk features are used by many species, including cephalopods, to feed by scraping or tearing food.
What is a radula
Unlike gastropods and bivalves, scaphopods lack this feature for gas exchange.
What are gills
This "living fossil" cephalopod has barely changed in hundreds of millions of years.
What is the nautilus
Cephalopods can change size, shape, and color to be different animals.
What is the ability to Mimic
Cephalopods have advanced appendages used for exploring, tasting, grasping, and independently controlling movement.
What is a tentacles
All mollusks, including scaphopods and cephalopods, have this protective tissue that secretes the shell.
What is the mantle
Most mollusks have open circulatory systems, but cephalopods have this type instead.
What is a closed circulatory system
Scaphopods lack this as they primarily live buried underground.
What is eyes
Cephalopods have a strong sharp beak used for feeding made out of what?
What is a chitin
Members of this ancient cephalopod group have external, chambered shells and many tentacles.
What are nautiluses
Cephalopods have three of these vitals organs, humans have one of these organs.
What is heart
Compared to clams and snails, cephalopods are unique in their ability to do this for rapid escape.
What is jet propulsion
Cuttlefish, squid, and octopuses can do this with specialized skin cells called chromatophores
What is change color or camouflage
Scaphopods lack these two major organ systems common in other mollusks: one for respiration, and one for filtering waste from blood.
What are gills and a heart (or circulatory system)
Scaphopods feed on microscopic organisms using these tentacle-like organs.
What are captacula
Like bivalves and gastropods, cephalopods and scaphopods show this type of symmetry.
What is bilateral symmetry
Scaphopods differ from cephalopods by having no brain, eyes, or this key sensory organ found in most cephalopods.
What is a statocyst (or sensory lobes)
This extinct cephalopod group had coiled or straight shells and is used as an index fossil.
What are ammonites