Difference Between Crab and Lobster

Edited by Diffzy | Updated on: August 25, 2023


Difference Between Crab and Lobster

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Crabs and lobster both are marine spineless creatures that have a place in the class Crustacea under the phylum Arthropoda. Both are well-known fish. Albeit both are shellfish and clones, they don't share a lot of practically speaking.

Both of these marine creatures are essential parts of the crustaceans and are notable for their contribution to fish foods all over the world and culture overall. These species are extremely abundant, occupy each sea on the planet, and assume a huge part in the maritime biological system.

Allow us to perceive how a crab varies from a lobster!

Crab vs Lobster

An unmistakable contrast between the crab and lobsters is the state of the exoskeleton; the crab has a more modest roundabout exoskeleton, though the lobster is bigger and longer. A lobster likewise has a long tail, which comprises a large portion of its meat. When contrasted with lobsters, crabs likewise have an unmistakable walk; they will quite often stroll sideways, though lobsters don't.

 With regards to fish, there is a ton of assortment, from normal fish to shellfish, like shrimp, to molluscs and clams. In any case, if somebody somehow happened to be asked what they might want to have as a fish treat, most would select crab or lobster.

Crab and Lobster are two kinds of shellfish. Crustaceans are an exceptionally huge gathering of arthropods, and that implies that they have an exoskeleton, which they shed to develop. Dissimilar to different arthropods, scavengers have biramous (two-separated) appendages.

Crabs are, for the most part, covered with a thick exoskeleton and have a solitary set of paws. Crabs are viewed from one side of the planet to the other and, subsequently are a superb type of fish in many societies. They live in new water and ashore, especially in tropical areas. Crabs structure around 93 families under the Brachyura, comprising around 6,793 distinct species.

Crabs can shift in size from the pea crab, which is a couple of millimetres wide, to the Japanese bug crab, which has a leg length of up to 4 meters (13 ft). In any case, numerous different creatures with comparative names, for example, recluse crabs, ruler crabs, porcelain crabs, horseshoe crabs, and crab lice are false crabs.

Lobsters, then again, are spineless creatures with a hard defensive exoskeleton. Like crabs and different arthropods, lobsters should shed their exoskeleton to develop. At the point when they shed their exoskeleton, they are truly powerless. Lobsters have 10 strolling legs. The front three sets have hooks; the first is the biggest. These give the lobsters their particular look. Lobsters likewise have radio wires on the highest point of their head, which they use as sensors in the water and to convey.

It has been assessed that lobsters are 70 years of age. The research proposes that lobsters may not dial back, debilitate, or lose fruitfulness with age, and on second thought, more seasoned lobsters might be richer than more youthful lobsters.

Numerous crustaceans have "lobster" in their names; in any case, just the mauled lobsters of the family Nephropidae are viewed as obvious lobsters. The nearest living family members of ripped-at lobsters are the reef lobsters and the three groups of freshwater crawfish.

 An unmistakable contrast between the crab and lobsters is the state of the exoskeleton; the crab has a more modest round exoskeleton, while the lobster is bigger and longer. A lobster likewise has a long tail, which comprises the vast majority of its meat. When contrasted with lobsters, crabs likewise have a particular walk; they will generally stroll sideways, though lobsters don't. Lobsters additionally have bigger hooks when contrasted with crabs.

Additionally, the meat of crabs is, for the most part, viewed as better. Notwithstanding, the meat of delicate shell lobsters is likewise extremely sweet. Albeit, the meat on the lobsters is more abundant because of most of it being situated in the tail and because of its size, which is the reason lobsters are simpler to eat. Lobsters are additionally commonly more costly than crabs, as they are not accessible as promptly as crabs.

Difference Between Crab and Lobster in Tabular Form

TaxonomyBelongs to the infraorder BrachyuraBelongs to the Nephropidae family
Body ShapeGenerally flatter and wider bodyElongated, cylindrical body
LegsTypically have 10 legsTypically have 10 legs
ClawsMay have two large clawsTypically have two large claws
AppendagesShorter appendages, including walking legs and paddlesLonger, more slender appendages, including walking legs
CarapaceBroad carapace covering the bodyThe carapace is more elongated
SizeSmaller in size compared to lobstersGenerally larger than crabs
HabitatFound in various marine environments, from shallow waters to deep seaPrimarily found in the ocean, often in rocky crevices
ColorVariable, often with mottled patternsTypically a solid color, often greenish-brown or blue
AntennaeShorter and less prominent antennaeLonger and more prominent antennae
EyesLocated at the front of the carapaceLocated at the sides of the carapace
DietOmnivorous, feeding on a variety of algae, plankton, mollusks, and small fishCarnivorous, mainly preying on small fish and other crustaceans
Meat TextureGenerally sweet and tender meatMeat is firm and often considered more succulent
FlavorFlavor can vary depending on species and dietFlavor is often described as sweet and delicate
Culinary UsePopular in various cuisines, often used in crab cakes, soups, and saladsHighly valued in seafood dishes, especially in lobster bisque and lobster tail dishes
MaturityMolt to grow and reach maturityMolt to grow and reproduce
ReproductionFemales carry eggs externally, called a "sponge"Females carry eggs internally, in a specialized chamber called a "berried"
BehaviorSome species are more social and live in groupsOften solitary and territorial

What is Crab?

Crabs are decapod crustaceans of the infraorder Brachyura, which normally have an exceptionally short anticipating "tail" (mid-region), typically concealed totally under the chest (Brachyura signifies "short tail" in Greek). They live in every one of the world's seas, in freshwater and ashore, are by and large covered with a thick exoskeleton, and have solitary sets of pliers. They initially showed up during the Jurassic Time frame.

Crabs are, by and large, covered with a thick exoskeleton, made fundamentally out of exceptionally mineralized chitin, and furnished with a couple of chelae (paws). Crabs change in size from the pea crab, a couple of millimetres wide, to the Japanese bug crab, with a leg range of up to 4 m (13 ft). A few different gatherings of crustaceans with comparable appearances -for example, lord crabs and porcelain crabs - are false crabs yet have developed highlights like genuine crabs through an interaction known as carcinisation.

Crabs are tracked down on the world's seas, as well as in new water and ashore, especially in tropical districts. Around 850 species are freshwater crabs.

Crabs commonly stroll sideways (thus the term crabwise) due to the enunciation of the legs, which makes a sidelong step more effective. A few crabs stroll forward or in reverse, including raninids, Libinia emarginata, and Mictyris platycheles. A few crabs, similar to the Portunidae and Matutidae, are likewise fit for swimming, the Portunidae particularly so, as their last sets of strolling legs are smoothed into swimming oars.

Crabs are, for the most part, dynamic creatures with complex ways of behaving, like conveying by drumming or waving their pliers. Crabs will generally be forceful toward each other, and guys frequently battle to get to females. On rough beaches, where virtually all caverns and cleft are involved, crabs may likewise battle about concealing openings. Fiddler crabs (variety Uca) dig tunnels in sand or mud, which they use for resting, stowing away, and mating, and to safeguard against gatecrashers.

Crabs are omnivores, taking care of basically green growth and taking some other food, including molluscs, worms, different shellfish, parasites, microscopic organisms, and rubbish, contingent upon their accessibility and the crab species. For some crabs, a blended eating routine of plant and creature matter results in the quickest development and most noteworthy wellness. A few animal groups are more well-versed in their eating regimens, given microscopic fish, shellfish, or fish.

Crabs are known to cooperate to give food and security to their family and during mating season to track down an agreeable spot for the female to deliver her eggs.

Human Consumption

Crabs are ready and eaten as a dish in a wide range of ways from one side of the planet to the other. A few animal types are eaten entire, including the shell, for example, delicate shell crabs; with different species, simply the hooks or legs are eaten. The last option is especially normal for bigger crabs, for example, the snow crab. In many societies, the roe of the female crab is additionally eaten, which, for the most part, seems orange or yellow in ripe crabs. This is famous in Southeast Asian societies, a few Mediterranean and Northern European societies, and on the East, Chesapeake, and Bay Shorelines of the US.

In certain locales, flavours work on the culinary experience. In Southeast Asia and the Infosphere, masala crab and stew crab are instances of vigorously flavoured dishes. In the Chesapeake Sound area, blue crab is frequently steamed with Old Straight Flavoring. Alaskan ruler crab or snow crab legs are typically just bubbled and presented with garlic or lemon spread.

For the English dish dressed crab, the crab meat is separated and put inside the hard shell. One American method for getting ready crab meat is by removing it and adding differing measures of covers, for example, egg white, saltine dinner, mayonnaise, or mustard, making a crab cake. Crabs can likewise be made into a bisque, a worldwide dish of French beginning which, in its true structure, remembers for the stock the pounded shells of the shellfish from which it is made.

Impersonation crab, likewise called surimi, is produced using minced fish meat that is created and shaded to look like crab meat. While it is some of the time hated among certain components of the culinary business as an unsatisfactorily bad quality substitute for genuine crab, this doesn't thwart its fame, particularly as a sushi fixing in Japan and South Korea, and in-home cooking, where cost is in many cases a main concern. Without a doubt, surimi is a significant wellspring of protein in most East and Southeast Asian societies, showing up in staple fixings, for example, fish balls and fish cake.

What is Lobster?

Lobsters are a family (Nephropidae, equivalent word Homaridae) of marine shellfish. They have long bodies with strong tails and live in fissures or tunnels on the ocean bottom. Three of their five sets of legs have hooks, including the primary pair, which are generally a lot bigger than the others. Profoundly valued as fish, lobsters are financially significant and are many times perhaps the most beneficial item in the beachfront regions they populate.

Financially significant species incorporate two types of Homarus from the northern Atlantic Sea and scampi (which seem to be a shrimp or a "little lobster") — the Northern Half of the globe family Nephrops and the Southern Side of the equator variety Metanephrops.

Albeit a few different groups of shellfish have "lobster" in their names, the unfit term "lobster" by and large alludes to the pawed lobsters of the family Nephropidae. Pawed lobsters are not firmly connected with barbed lobsters or shoe lobsters, which have no hooks (chelae) or squat lobsters. The most comparative living family members of pawed lobsters are the reef lobsters and the three groups of freshwater crawfish.

Lobsters are spineless creatures with a hard defensive exoskeleton. Like most arthropods, lobsters should shed to develop, which leaves them powerless. During the shedding system, a few animal groups change tone. Lobsters have eight strolling legs; the front three sets bear hooks, and the first is bigger than the others. The front pliers are additionally organically thought about legs, so they have a place with the requested Decapods ("ten-footed"). Even though lobsters are, to a great extent, respectively balanced like most different arthropods, a few genera have inconsistent, specific paws.

Lobster life systems incorporate two primary body parts: the cephalothorax and the midsection. The cephalothorax wires the head and the chest, the two of which are covered by a chitinous carapace. The lobster's head bears radio wires, antennules, mandibles, and the first and second maxillae. The head likewise bears the (typically followed) compound eyes. Since lobsters live in dim conditions at the lower part of the sea, they generally utilize their radio wires as sensors. The lobster eye has an intelligent design over a curved retina. Conversely, most complex eyes utilize refractive beam concentrators (focal points) and an inward retina. The lobster's chest is made out of maxillipeds, extremities that capability basically as mouthparts, and pereiopods, members that serve for strolling and assembling food. The mid-region incorporates pleopods (otherwise called swimmerets), utilized for swimming, as well as the tail fan, made out of uropods and the telson.

Lobsters, similar to snails and bugs, have nobility because of the presence of hemocyanin, which contains copper. Conversely, vertebrates and numerous different creatures have red blood from iron-rich haemoglobin. Lobsters have a green hepatopancreas, called the tomalley by culinary experts, which capabilities as the creature's liver and pancreas.

Lobsters of the family Nephropidae are comparative in general structure to a few other related gatherings. They vary from freshwater crawfish without the joint between the last two fragments of the chest, and they contrast with the reef lobsters of the family Enoplometopidae in having full paws on the initial three sets of legs, as opposed to only one. The qualifications from fossil families, for example, the Chilenophoberidae, depend on the example of sections on the carapace.

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Human Consumption

Lobster is normally served bubbled or steamed in the shell. Cafes break the shell with lobster saltines and fish out the meat with lobster picks. The meat is frequently eaten with softened spread and lemon juice. Lobster is additionally utilized in soup, bisque, lobster rolls, cappon magro, and dishes like lobster Newberg and lobster Thermidor.

Cooks bubble or steam live lobsters. At the point when a lobster is cooked, its shell's variety changes from blue to orange in light of the fact that the intensity from cooking separates a protein called crustacyanin, which stifles the orange tint of the compound astaxanthin, which is likewise tracked down in the shell.

Main Difference Between Crab and Lobster (In Points)

  • Crabs are more modest in size than lobsters, Lobsters are bigger.
  • The crab's eyes are situated on the eyestalks. Then again, lobster's eyes are available at the foundation of the receiving wires.
  • The body of the crab is covered with an enormous carapace and a more modest round exoskeleton. Though lobsters have longer and bigger exoskeletons.
  • Crab hooks are more modest in size when contrasted with those of lobsters.
  • There are around 6800 types of crabs. Then again, there are just 85 types of lobsters.
  • Crabs can satisfy 3 to 4 years, while lobsters can satisfy 70 years.
  • Crabs are social animals, while lobsters are single animals.
  • Crabs have four sets of legs and one set of hooks. Then again, lobsters have five sets of legs, out of which one set is altered into hooks.


Taking everything into account, while both crab and lobster are tasty fortunes from the ocean, they have unobtrusive yet particular contrasts that put them aside. These distinctions reach out past their taste, and understanding them can improve your appreciation for these radiant scavengers.

Crabs, with their more limited bodies and sidelong leaving step, resemble the enchanting trapeze artists of the submerged world. They will quite often have better, more sensitive meat, ideal for dishes like crab cakes or crab bisque. Lobsters, then again, with their stretched bodies and amazing paws, radiate a demeanour of polish. Their meat is known for its firm surface and rich, rich flavour, making lobster tails and lobster moves a connoisseur enchant.

At last, the decision among crab and lobster boils down to individual inclination. Do you favour the sweet, delicate pieces of crab or the rich, delicious meat of lobster? Both are excellent by their own doing, and maybe the genuine euphoria lies in relishing them on various events, commending the nuanced contrasts that make every one of them a gift from the ocean. Whether you love crab or lobster, one thing is for sure - the sea's abundance offers a universe of culinary joys, ready to be investigated and delighted in.


  • https://en.wikipedia.org/wiki/Lobster
  • https://en.wikipedia.org/wiki/Crab


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"Difference Between Crab and Lobster." Diffzy.com, 2023. Mon. 25 Sep. 2023. <https://www.diffzy.com/article/difference-between-crab-and-lobster>.

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