What is the Difference Between Crab and Scorpion

Difference Between Crab and Scorpion

People may find distinguishing between crabs and scorpions difficult because they share many features. (6 legs, 2-parted)Both are arthropods; crabs are crustaceans (6 legs, 2-parted), while scorpions are arachnids (8 legs, 3-parted). What is the difference between a crab and a scorpion? These two creatures, though, are very different in terms of their taxonomy, morphology, behavior, and habitat. In this post, each difference will be covered in detail.

What is The Difference Between a Crab and a Scorpion

Crabs and scorpions can be distinguished in terms of the following:

  • Habitat: Water or Land
  • Common Colors
  • Appearance and Body Frame
  • Design and Location of Their Eyes
  • Pincers
  • Movement and Speed
  • Feeding Habits
  • How They Hunt and Eat Their Prey

Habitat: Water or Land

Crabs of many different species may survive in both freshwater and saltwater. Although some species live in shallow waters, others might be found on the deep ocean bottom. Even some could thrive on land. Because of this, you could see crabs scuttering sideways near a beach, sea cliff, or muddy lake. As habitats have evolved, different species have adapted to survive. On the other hand, scorpions typically inhabit semi-arid, desert, and rainforest climates. They frequently lurk out behind logs and rocks.

Common Colors

When alive, crabs are typically olive-green, brown, or grey, but when cooked, they become brilliant red. There are many different colors of scorpions. Most of them have camouflage colors like black or yellow that aid them in blending in with their environment. Depending on the species, some are brown or red. If you turn on the UV light during the night, you can easily identify a scorpion. When exposed to UV light, the scorpion glows and takes on a vibrant blue-green hue.

Appearance and Body Frame:

Crab has a rounded body and a circular exoskeleton protected by a thick, large shell. It has four pairs of legs and two distinguishable pincers or claws. Two sets of antennae are common in crabs. This characteristic sets them apart from closely related crab and arthropod species.

In comparison to crabs, scorpions have somewhat elongated bodies. In addition, they have one set of pincers and four pairs of legs. But compared to crabs, they have smaller pincers. A scorpion’s elongated, segmented tail, which curves forward and has a poisonous stinger at the tip, sets it apart from a crab.

Design & Location of Their Eyes:

The crab’s eyes are on the two stalks that have sprouted from its head. These eyestalks feature thousands of light-sensitive facets that allow them to view everything around them in all directions. Crabs can sense danger quickly thanks to their excellent vision, allowing them to escape for protection.

On the other hand, scorpions have poor vision. They have two eyes on top of their heads and two to five eyes down each side, based on the species, which is quite ironic. Although they cannot see very well, their eyes are extraordinarily sensitive. Among all arthropods, it is one of the highest. It is said that sensitivity depends on the habitat. Despite their poor vision, they can still detect movements around them because of their very sensitive eyes.


In contrast to scorpions, crabs have larger pincers. The size of the crab typically depends upon its species and body frame. Pincers on scorpions are smaller. However, they can also pick up and hold objects or food.

Movement and Speed

The majority of crabs crawl or walk sideways. Although they could still go backward, forward, or diagonally, moving sideways is faster and easier. This is due to the rigidity and outward bending of their legs. With this special design, they can slide to the side more effectively. One feature distinguishing a crab from a scorpion, which tends to move forward, is the ability to walk sideways. Generally speaking, scorpions move more quickly than crabs.

Feeding Habits

Crabs are omnivores. Their main food source is algae, although they may also consume other things, including worms, small fish, mollusks, and other crustaceans. Contrarily, scorpions usually eat insects for food. However, scorpions may also consume nearly any prey they can catch as long as it is smaller than themselves to live in unfavorable conditions and environments.

How They and Eat Their Prey

Food pieces are grabbed and held by crabs using their claws or pincers before being placed in their mouths. Additionally, to make the meal simpler for them to absorb, they split it up into smaller pieces with their pincers. When they need to crush the shells of other sea animals, they want to eat. Their powerful pincers come in useful.

Scorpions also grab their prey with their pincers. They inject neurotoxic venom into their prey while rushing around using their deadly stingers. They find it simpler to eat their prey because the poison has already immobilized it. Scorpions shouldn’t eat solid stuff because they can only ingest liquids. Thus, they should discard them. They extract a small piece of food from the prey and then spit out the solid particles using their chelicerae, sharp, small structures in their mouth.

Who Would Win a Crab and a Scorpion?

The crab is superior to the scorpion in crushing strength and defensive armor. However, the scorpion is armed with a lethal stinger in this case. If the scorpion finds a weak area in the crab’s protective shell and injects its poison into it, the crab will die. But other than that, the crab has the advantage.

Are Crabs and Scorpion Both Edible?

Restaurant menus frequently include crab dishes. Although most crabs are safe to eat, certain species contain toxin doses that can be fatal. Several members of the Xanthidae family are poisonous. These crabs are distinguished by having pincers with black tips. The toxins aren’t produced by these poisonous crabs on their own, though, unlike scorpions. Most likely, their environment or nutrition are the causes. On the other side, despite having poisonous stingers, scorpions can be eaten. One of the more unusual foods served in restaurants or at food carts in some countries is scorpions. Naturally, the venom gland and stinger must be removed before eating, especially if the scorpion is consumed raw.


There are about 2,000 species of scorpions, but only 30 or 40 carry poison potent enough to kill a human. Yet there are over 4500 species of crab on Earth. For the last 450 million years, crabs have been on Earth. What is the difference between a crab and a scorpion? Both arthropods have pincers, but scorpions are arachnids, and crabs are crustaceans. They are different in many aspects explained in this article. If they fight, the scorpion wins by injecting its venom into the weak spot of the crab’s shell, and it will ultimately die.


What happens if a crab bites you?

The pubic area experiences severe itching as the main symptom of crabs. Insects that bite are called pubic lice or crabs because they are little parasitic insects that eat blood. The bites itch very badly because of an allergic reaction in your body (think mosquito bites).

Are scorpions poisonous to humans?

While painful, scorpion stings are seldom fatal. The two groups most at risk for major problems are young children and older persons. The only scorpion species in the US with venom strong enough to produce serious symptoms is the “bark scorpion,” mostly found in the desert Southwest.

What’s the most poisonous crab?

A species of crab called Zosimus aeneus, often referred to as the “devil crab”, “devil reef crab,” or “toxic reef crab,” is found on coral reefs in the Indo-Pacific region, from East Africa to Hawaii.

Are scorpions healthy to eat?

The nutritional value of scorpions can serve as a rich supply of protein, energy, minerals, and fat. The phytate, oxalate, and tannin content limit its use.

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