Animals with shells of various shapes and sizes

Hermit crabs, lobsters, and shrimp are crustaceans. Only mollusks can't manufacture their own shell. Hermit crabs weigh 1 ounce. They devour decaying stuff. Hermit Crabs need a balanced habitat.

Hermit Crabs

Southern U.S. Gopher Tortoises. In grasslands and flatwoods. This turtle grows 7 to 19 inches. Gophers can dig 40-foot holes. Grass, berries, sand, shells, and charcoal are part of their diet.

Gopher Tortoises

Ticks are arachnids, not insects. The Wood tick is widespread. This tick carries Rocky Mountain spotted fever. The tick burrows into the skin to bleed animals and people.They reside in woodlands.

Wood Tick

Terrestrial. Shelled animals are food and pests. Snail hides in its shell when sleepy or terrified. Mucus protects. Threatened mucus grows. Even near their opening. This repels predators. Mucus-covered. Snails can survive 5°F.

Garden Snail 

28-pound King Crabs have 6-foot legs. In Alaska's cold waters. Brownish-bluish King Crabs. Their shell has spines and 3 legs. Intruders. They're imported, overpopulated, and upsetting their ecosystem's balance.

King Crab 

A freshwater and land reptile, the Common Snapping Turtle. They're found east of the Dakotas. Snapping turtles reside in shallow, vegetated streams and ponds. They burrow in the mud with only their head showing.

Common Snapping Turtle

The Northern lobster, or Maine Lobster, lives in the North Atlantic Ocean. Seafloor crustaceans live here. They hide in rock crevices from eels, seals, and fish. The Northern lobster has 5 legs and a string tail to fight predators.


Spanish means "tiny armoured." South Americans called the animal "armour" because of its leathery shell. Only the armadillo has a shell. It eats termites and ants. They inhabit grasslands and shrubs.

 Nine Banded Armadillo

Giant Clams are mollusks' largest species. Giant clams have blue, pink, and green shells. Once on a reef, they stay there for life. They devour plankton and algal nutrients. Giant clams are eaten by eels, snails, and reef fish.

Giant Clam

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