How long does a mollusk live?

Squids generally live about a year, and octopi and cuttles live from 1-4 years, depending on the species. The nautili (plural for “nautilus”), which are the only cephalopods that have an external shell, are also the longest-lived; biologists estimate that they can live up to 20 years.

What are the 7 classes of mollusks?

Mollusks can be segregated into seven classes: Aplacophora, Monoplacophora, Polyplacophora, Bivalvia, Gastropoda, Cephalopoda, and Scaphopoda. These classes are distinguished by, among other criteria, the presence and types of shells they possess.

What is the most intelligent group of mollusk?

cephalopod class

Which is the largest group of mollusks?

gastropods

Do molluscs have eyes?

Molluscan eyes are extremely varied, ranging from a simple eye cup or pit eye that is open to the environment to closed lens eyes much like those seen in fish (Fig. 1), compound eyes that superficially resemble the eyes of flies, pinhole eyes, and eyes with mirrors.

Do mollusks feel pain?

After discussing this framework in detail, we conclude that molluscs are incapable of feeling pain since the nervous system of molluscs (unlike humans) lacks the neural architecture required to implement the requisite computations defined within this framework.

Can mollusks swim?

Mollusks include the coat-of-mail shells or chitin, marine and freshwater snails, shell-less sea slugs, tusk shells, clams, mussels, octopuses, squids, cuttlefishes, and nautiluses. While some mollusks can swim, most are attached or live creeping along the bottom.

Can mollusks reproduce asexually?

Mollusk reproduce asexually by being hermaphroditic where they are both male and female they also asexually reproduce by budding.

Do mollusks have a digestive system?

Mollusks have a radula for grinding food. A digestive gland is connected to the stomach. The tissue beneath the shell is called the mantle. The digestive system includes a gizzard, a stomach, a digestive gland, and the intestine.