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agate giant african land snail, Latin name Lissachatina fulica, on a stone against a green background

A brown snail shell illuminated by the evening sun and photographed on a stone background with a macro lens, high resolution with copy space

snail is walking in the grass, close-up shot

Golden Apple snail in a freshwater aquarium.

Snail

Close up of a Roman Snail (Helix pomatia) with vignette.

Close up image of a white shell with natural background.

Spring mood

Snail shell coiled texture macro web banner- warm brown and golden colored full frame background with selective focus on the center spiral, Fibonacci Numbers In Nature concept

Primer plano de un tronco seco de madera

Macro shot of a brown snail shell, close-up

A macro close-up of a snail in nature.

Freshwater snail shell under water

Close-Up Of Shell Clam Against White Background.

Mussel shell on the sand

A brown snail shell illuminated by the evening sun and photographed on a stone background with a macro lens, high resolution with copy space

Many species of gastropods have a more or less large outer shell: atrophied in slugs, it is large enough to shelter the whole animal in snails for example; it then constitutes protection against predators and drought. These shells, called univalves, have special features compared to the shells of other molluscs. They are optional or compulsory calcicole (limestone obtained in the plants on which they feed or by scraping the calcareous mineral substrates), more rarely calcifuge and in regions with non-calcareous soil can chew the shell of other individuals (case of parasitism), bone, eggshells. The shell is secreted by a thick fold of skin, called the mantle. It is mainly composed of calcium carbonate. Gastropods therefore need a diet rich in calcium.

Snail, close-up.

Close up of a snail on the ground

A caucasian hand is holding a White-lip Globe Snail (Mesodon thyroidus--a terrestrial gastropod mollusk) in this Point of View image. There is copy space at the bottom of the image. One antenna is just starting to stick out.

A snail on a lichen rock. Blurred background.

Winter is leaving, spring is coming.

Snail on top

Preparing French Escargot Snails with Herb Butter

Close up on the shell of a snail. Selective focus, dark background

Helix pomatia, common names the Roman snail, Burgundy snail, or escargot.

Auction of an ammonite more than millions of years old also called cephalopods

Primer plano de un caracol pequeño

spiral-shaped snail

Hard fresh clam on white background - stock photo.

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