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THE 5 RARE MOLLUSCS » Characteristics and Lifestyle

The sea floor is home to amazing creatures, rare animals that dazzle with their beauty and unique characteristics. Among these are the rarest molluscs in the world, and we’ll tell you about them below.

In our ranking we have included the most amazing of all molluscs, rare animals that stand out for their incredible appearance or way of life.

The 5 Rarest Molluscs in the world

Among the rare molluscs in the world are the following:

1. Squid Worm

The Squid Worm (Teuthidodrilius Samae) is apparently a segmented worm, similar to an earthworm, but with a strange and unattractive appearance.

It is called a squid worm because its body has 25 pairs of white cells and 10 appendages on the front side, giving it an unusual squid-like appearance.

2. Flamingo Tongue

The Flamingo Tongue Snail (Cyphoma gibbosum) is a mollusc found in the waters of the American continent. It has a fusiform, elongated shell and is bright orange in colour.

3. Chromodoris Lochi

Chromodoris Lochi, also called Loch’s chromodoris is a nudibranch mollusk that can measure about 6 centimeters in length. Its dorsal layer is oval and has a pale blue colouring. But it is also traversed by a sub-marginal black oval line.

4. Blue sea Slug

The Blue sea Slug (Glaucus Atlanticus) is also known as Sea Swallow and is characterized by the predominance of this color throughout its body. Its anatomy is flattened truncated cone and has six appendages that branch out into cerata rays.

5. Dumbo Octopus

The Dumbo Octopus (Grimpoteuthis bathynectes) is a rare octopus that has large fins that are similar in appearance to the ears of the famous cartoon elephant.

Characteristics of the Rarest Molluscs

Rare molluscs have a soft, muscular body that may have an inner or outer shell. The mass of the body comprises most of the organs.

Also, they are characterized by having brain ganglia, a membrane that protects their internal organs and a lower limb that helps them move.

There are at least three types of rare molluscs: gastropods, bivalves and cephalopods. The former, which include all types of snails such as the Flemish tongue, crawl with a fleshy foot.

In addition, the shells of gastropods are characterized by being univalve, that is, they are made up of a single piece that is usually in the form of a spiral.

The bivalves, on the other hand, have shells formed by two halves (shells) which are joined together as if by hinges and which fit perfectly, so that when they are closed they protect the animal.

Although bivalves do not have heads, they have chemoreceptors, sensory organs that detect the tastes and smells of water.

On the other hand, there are also cephalopods, molluscs that have several tentacles (usually eight or ten) that are grouped around the head and mouth. The squid worm and the dumbo octopus are just two examples of rare animals that are in this group.

All molluscs have a nervous, circulatory and digestive system, as well as reproductive organs.

Where are the rarest molluscs found?

Molluscs make up 23% of sea animals, however, they also live in fresh water and even on land.

So as you can imagine, molluscs exist all over the world. They can be found on the surface of the waters and in the depths, but they can also be found on the land and under the land.

Land-based mollusks have lungs, but marine mollusks have gills that help them breathe in the different environments where they are.

Although molluscs in general have the capacity to live in any kind of environment thanks to their physiological characteristics, all the rare animals we described in the previous section live in the seas and oceans.

The species of this giant family can be found at 3,000 meters above sea level as well as in depths of the oceans over 5,000 meters.

What and How do rare molluscs feed?

Depending on the species, their diet is very varied.

For example, snails are herbivores and another species like cephalopods feed on fish, that is, they are carnivores.

Some of the rarer molluscs have an organ called the proboscis, which allows them to feed, while others have a radial, which is nothing more than a horny band with hard little teeth that serves to rake up the food.

On the other hand, there are mollusks that feed by filtering out the organic particles present in the sea.

How do these animals reproduce?

Their way of reproducing is sexual although it can vary.

They can be unisexual or hermaphroditic. In some, fertilization is external and in other cases it is internal.