19 Ark Clam Facts You’ll Never Forget

Ark clam facts are amazing.

Ark clams are edible saltwater clams that range from small to large in size. They belong to the family Arcidae and Bivalvia class of animals. They are also called two shelled mollusks because they possess two shells on their body, one on top of another. The shells are thick and are generally white or cream in color, although some species are known to have brown-colored shells as well. The thick shells of the ark shell clams vary in shape from species to species. The hinge line of ark clams are long and straight and covered with numerous small teeth and they have radiating ribs. Ark clam predators generally include other larger species of fish or marine creatures. Ark clams are consumed as food by many localities and are farmed in many regions as seafood.

Keep on reading to know more about ark clams. Check out our articles about the clam and giant clam to learn more about other animals.

Ark Clam

Fact File

What do they prey on?

Planktons and detritus

What do they eat?


Average litter size?


How much do they weigh?

1.2 oz (34 g)

How long are they?

1-2.5 in (2-6 cm)

How tall are they?


What do they look like?

Brown and white

Skin Type


What are their main threats?

Humans and stingfish

What is their conservation status?

Not Evaluated

Where you'll find them

Mud and shallow water


Australia, North America, Singapore, and the Caribbean





Scientific Name

Turkey wing ark clam: Arca zebra Blood ark calms: Anadara granosa Barbatia ark clam: Barbatia amygdalumtostum




Anadara, Barbatia, Arca

Ark Clam Interesting Facts

What type of animal is an ark clam?

Ark clams are small to large-sized saltwater clams that belong to the family Arcidae.

What class of animal does an ark clam belong to?

Ark clams belong to the Bivalvia class of animals and family Arcidae.

How many ark clams are there in the world?

The exact population of these shellfish is not yet known. However, there are almost 200 known species of ark clams found worldwide such as blood ark clams (Anadara granosa), Turkey wing ark clams (Arca zebra), and Barbatia ark clams (Barbatia amygdalumtostum).

Where does an ark clam live?

Ark shell clams can be found in various regions of the world, especially on the northern shores. Singapore and Texas beach are some of the many ark clam locations.

What is an ark clam's habitat?

The habitat of ark clams includes shallow water where they can be seen burrowing in the sandy or mud grounds under the water.

Who do ark clams live with?

Not much is known about the movement of ark shell clams. However, they are known to extensively use of their feet while traveling or digging underwater.

How long does an ark clam live?

The lifespan of ark clams ranges from five to 1o years.

How do they reproduce?

Sexual maturity for both males and females occurs after almost one year. Following this, the females release eggs into the water which are fertilized by the males. However, not all of these fertilized eggs can reach the mature stage successfully.

What is their conservation status?

The conservation status of ark clams is Not Evaluated under the International Union for Conservation of Nature. There is no imminent threat to their population as of now that will make them extinct.

Ark Clam Fun Facts

What do ark clams look like?

Ark clams are known to possess whitish cream-colored thick or hard shells, although some also have brown-colored thick shells. This varies from species to species of ark clams. Ark shells also have another thick brown colored outer layer of shells on top of it which is why they are also known as two-shelled mollusks. Their thick shells allow them to camouflage with their habitat. From a distance, they appear to be white stones lying on the bottom of the ocean.  The hinge line of the ark shell clam is long and straight and covered with numerous small teeth. The thick shells of ark clams vary in shape from species to species.,_Florida,_USA)_1_(49767573446).jpg

(Ark clams are filter feeders.)

How cute are they?

Ark shell clams are beautiful, especially because of the light coloration like white or brown of their thick shells. They are not at all scary and a group of them lying under the water is a scene that is beautiful to look at. They also have an outer layer of shell making them double layered.

How do they communicate?

Not much is known about how ark clams communicate with each other. However, according to several estimates, they are known to pick up stimuli and react to them accordingly. Other than that, they are rather dull and do not possess any conscious thought process whatsoever.

How big is an ark clam?

Ark clams are small to large-sized creatures. The average length attained by ark clams ranges from 1-2.5 in (2-6 cm) in length. In comparison, the giant clam is enormous and has a length of 4 ft (1.2 m).

Can an ark clam move?

Yes, ark clams can move although their movement is very slow. Their feet allow them to move side to side very slowly. They make extensive use of their legs, especially while digging into the ground under the water.

How much does an ark clam weigh?

Ark clams can be small or large in size, depending upon the species. They are known to weigh 1.2 oz (34 g). Oysters also fall under the same family, Bivalvia, and they have a weight of 0.11-0.12 lb (0.04-0.05 kg).

What are the male and female names of the species?

There is no gender-specific name for this species. Males are called male ark clams, while females are known as female ark clams.

What would you call a baby ark clam?

There is no such specific name for juvenile ark clams. Although, certain species after reaching the larval stage are known as spats.

What do they eat?

Ark shell clams are known to feed on plankton and detritus. They open their shell which generates a large quantity of water. They then filter out the edible particles with the help of their gills which is why they are called filter feeders. The hinge lines of ark clams are filled with numerous small teeth.

Are they harmful?

No, ark clams are not exactly harmful. They do not pose any direct threat to a human being and are consumed as food in many regions.

Would they make a good pet?

No, ark clams are not at all a good pet. Some species are small in size and need to be handled accordingly. Moreover, they do not display any affectionate behavior towards humans and are rather dull in that sense. Therefore, keeping them as a pet wouldn't be a fun experience for any individual.

Do clams have blood?

Yes, most species of clams have clear blood in their bodies, with a few exceptions like the blood ark clams (Anadara granosa). However eating them is not exactly a good idea as it can cause hepatitis among human beings. For this very reason, consumption of them has been banned in a few countries like China.

Did you know...

Ark shells are thick or hard enough to withstand a strong current of water.

Most clams have clear blood while the blood ark clam (Anadara granosa) is known to have red-colored blood.

The shell of Turkey wing ark clams ( Arca Zebra) is covered with brown and white stripes which gives the appearance of a turkey's wings.

Stingrays are one of the many predators that are strong enough to break into their hard shells.

Can you eat ark clams?

Yes, ark shell clams are edible creatures. In fact, they are farmed as seafood in several places just like freshwater mussels. Several localities also harvest clam ark as an edible substance. A popular dish is ark clam chowder. One of the many ways to cook an ark clam is to first cook it in warm water to make the meat sot. Furthermore, add some garlic and shallot to the broth to make it flavourful. After it is properly cooked, use the remaining broth as a base to make a white sauce and then heat the meat and the other ingredients in it for some time. After some time, when they are properly heated up, they are ready to be eaten.

What is a false ark clam?

False ark shell clams are known to be a small genus of saltwater clams that are related to ark shell clams. They belong to the family of Cucullaeidae.

Here at Kidadl, we have carefully created lots of interesting family-friendly animal facts for everyone to discover! For more relatable content, check out these scallop facts and oyster toadfish facts for kids.

You can even occupy yourself at home by coloring in one of our free printable clam coloring pages.



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