mollusks library

Mollusks are members of the invertebrate phylum Mollusca and contain more than 100,000 species. Some mollusks have shells like clams and snails, while larger mollusks have no bones at all like the cuttlefish, squid and octopus.

Could a squid take down a submarine?

Featured Article: Could a squid take down a submarine?

Giant squid are aggressive creatures that prey on almost anything that comes their way. How big do these monsters of the sea get, and could they really take down a watercraft? See more »

Could a squid take down a submarine?

Could a squid take down a submarine?

Giant squid are aggressive creatures that prey on almost anything that comes their way. How big do these monsters of the sea get, and could they really take down a watercraft?

See more »
How Octopuses Work

How Octopuses Work

To elude predators, the octopus will change color in an instant and even alter its shape to look like other sea animals. Does its magic put the chameleon to shame?

See more »
How Squid Work

How Squid Work

Squid have been featured in sailing myths and legends for more than 300 years. They're swift, agile and surprisingly intelligent creatures with brains larger in proportion to their bodies than most fish and reptiles have. Learn about all squid, squid anatomy and how big squid can can actually get.

See more »
Abalone

Abalone

Abalone, a marine snail. It is also called ear shell, sea ear, and ormer. Abalones live in warm areas of the Pacific Ocean, in the Indian Ocean, and on Europe's coasts.

See more »
Cephalopod

Cephalopod

Cephalopod, a marine animal. Squids, octopuses, argonauts, nautiluses, and cuttlefish are all cephalopods.

See more »
Mollusk

Mollusk

Mollusk, an animal belonging to the phylum Mollusca, a major division of invertebrates (animals without backbones).

See more »
Octopus

Octopus

Octopus, or Devilfish, an eight-armed marine invertebrate (animal without a backbone).

See more »
Oyster

Oyster

Oyster, an edible bivalve mollusk (one with a two-pieced shell). The two parts of an oyster shell are unlike in size and shape.

See more »
Scallop

Scallop

Scallop, an edible mollusk related to the oyster and the clam. There are more than 200 species of scallops.

See more »
Squid

Squid

Squid, a swift marine invertebrate (animal without a backbone). Squid are an important food in Asia and the Mediterranean area.

See more »

Ammonite

Ammonite, any one of a group of shelled sea animals that became extinct millions of years ago.

See more »

Argonaut

Argonaut, or Paper Nautilus, an eight-armed mollusk, closely related to the octopus.

See more »

Chiton

Chiton, a genus of marine mollusk. The boat-shaped shell of the chiton is composed of overlapping symmetrical plates.

See more »

Clam

Clam, the popular name for a number of two-shelled mollusks related to the scallops and oysters.

See more »

Cockle

Cockle, any of several two-shelled mollusks with ribbed shells. Cockles are popular as food in Europe.

See more »

Conch

Conch, a large marine mollusk having a spiral shell. The shells are often beautifully colored and are made into jewelry or are used as ornaments.

See more »

Cowrie

Cowrie, or Cowry, a small marine snail, found in warm waters. It has a glossy, roughly oval shell with toothed edges.

See more »

Cuttlefish

Cuttlefish, a sea animal related to the squid and octopus. It is not a fish but a mollusk.

See more »

Geoduck

Geoduck, or Gweduc, a clam found on the Pacific Coast of North America from Puget Sound to southern California.

See more »

Limpet

Limpet, a water-dwelling snail. Most kinds live in the sea on the shoreline. The shell of the sea limpet is usually a flattened cone one to two inches (2.5 to 5 cm) in length.

See more »