Difference Between Cephalopods and Gastropods

Cephalopods are strictly marine creatures -- they can only be found in the ocean. Gastropods, on the other hand, can live in a range of different environments. The majority of gastropods are terrestrial, meaning they live on land, but can also be found in the ocean and in freshwater lakes or streams.

1. What makes cephalopods different from other mollusks?
2. Is an octopus a gastropod?
3. How do gastropods bivalves and cephalopods feed?
4. What are 4 characteristics of gastropods?
5. What are the 4 types of cephalopods?
6. What is the major difference between bivalves and cephalopods?
7. What are the 6 molluscs?
8. Is a scallop a bivalve?
9. What is the largest mollusk in the world?
10. What are the 3 types of mollusk?
11. What is the most impressive sensory system of cephalopods?
12. What are the 3 major classes of phylum Mollusca?

What makes cephalopods different from other mollusks?

The most obvious difference between most cephalopods and other mollusks is the apparent lack of a shell. ... They are also the only cephalopods with four gills instead of two.) Cephalopods have a more developed nervous system than other mollusks. They also have very well developed eyesight that is used in finding prey.

Is an octopus a gastropod?

Molluscs are extremely diverse in tropical and temperate regions, but can be found at all latitudes. About 80% of all known mollusc species are gastropods. Cephalopoda such as squid, cuttlefish, and octopuses are among the neurologically most advanced of all invertebrates.

How do gastropods bivalves and cephalopods feed?

Diet: They are predators, using their arms (or tentacles) to trap prey, and a sharp beak to bite prey. They then stuff prey into a central mouth. Bivalves include clams, oysters, mussels and scallops.

What are 4 characteristics of gastropods?

Gastropods have a muscular foot which is used for "creeping" locomotion in most species. In some, it is modified for swimming or burrowing. Most gastropods have a well-developed head that includes eyes, 1-2 pairs of tentacles, and a concentration of nervous tissue (ganglion).

What are the 4 types of cephalopods?

The only exception is the nautilus which can be much longer lived.

• Birch Aquarium's Giant Pacific Octopus.
• Flamboyant Cuttlefish.
• California Market Squid.
• Chambered Nautilus.
• Fossilized ammonites, ancient cephalopods.

What is the major difference between bivalves and cephalopods?

Bivalves include clams, oysters, and mussels. As their name implies, they have two parts of their shell, which can open and close. Most have no head. Cephalopods include the octopus.

What are the 6 molluscs?

Class Gastropoda – snails, slugs, limpets, whelks, conchs, periwinkles, etc. Class Bivalvia – clams, oysters, mussels, scallops, cockles, shipworms, etc. The Class Scaphopoda contains about 400 species of molluscs called tooth or tusk shells, all of which are marine.

Is a scallop a bivalve?

Bivalve mollusks (e.g., clams, oysters, mussels, scallops) have an external covering that is a two-part hinged shell that contains a soft-bodied invertebrate. ... Like fish, bivalve mollusks breathe through their gills. As filter feeders, bivalves gather food through their gills.

What is the largest mollusk in the world?

Reaching lengths of up to 4 feet and weighing more than 500 lbs., the largest living mollusk, and bivalve for that matter, is the giant clam (Tridacna gigas).

What are the 3 types of mollusk?

The three major groups of mollusks are gastropods, bivalves, and cephalopods (SEF ul o pods). The largest group is the gastropods. These are mollusks like snails and slugs that have just one shell or no shell at all. Gastropods creep along on their broad foot.

What is the most impressive sensory system of cephalopods?

Cephalopods have advanced vision, can detect gravity with statocysts, and have a variety of chemical sense organs. Octopuses use their arms to explore their environment and can use them for depth perception.

What are the 3 major classes of phylum Mollusca?

The major classes of living mollusks include gastropods, bivalves, and cephalopods (Figure below).