Giant Crayfish vs Lobster: Comparing the King of the Sea

Giant crayfish and lobsters, though similar in appearance, differ in size, habitat, lifespan, and appearance, with lobsters being saltwater crustaceans found worldwide and giant crayfish being freshwater creatures native to Australia and New Zealand.

giant crayfish vs lobster

Giant crayfish and lobsters may look similar with their tough exoskeletons and clawed appendages, but these underwater creatures are quite different. 

From habitat preferences to physical characteristics, these crustaceans have evolved unique adaptations to thrive in their respective environments. 

Join us as we delve into the similarities and differences between these two underwater giants in a battle of the crustacean kings.

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What Is a Giant Crayfish?

noble crayfish  ( Astacus astacus ) on a stone in natural habitat; this is a protected vulnerable species, thriving only in remote clear and clean rivers

Giant crayfish, also called freshwater lobsters, are a crustacean species belonging to the family Parastacidae. These impressive creatures are native to freshwater ecosystems, such as rivers, streams, and lakes, in Australia and New Zealand.

Giant crayfish can grow to an enormous size (especially compared to others in their species), with some individuals reaching lengths of up to 31 inches and weighing over nine pounds. In contrast, white river crayfish (found in the southern United States) are typically about three inches long. 

Giant crayfish are omnivorous, meaning they feed on various plant and animal matter, including aquatic insects, small fish, and vegetation. These creatures are called “bottom-feeders” and frequently feed on animals and plants that have sunk to the river floor. 

Despite their impressive size and strength, giant crayfish are not immune to threats. Their populations are vulnerable to habitat loss, pollution, and overfishing. Some species of giant crayfish are considered endangered or critically endangered due to these factors.

Giant crayfish have cultural significance for Indigenous communities in Australia and New Zealand, who have used them as a food source and in traditional ceremonies for generations.

What Is a Lobster?

average weight of lobster

Lobsters are a type of crustacean found in oceans around the world. They belong to Nephropidae and are closely related to crabs, shrimp, and crayfish.

Lobsters are known for their distinctive appearance, which includes a tough exoskeleton, long antennae, and large claws. They can range in size from small species that are only a few inches long to larger species that can grow up to 3 feet long. 

Lobsters are scavengers and feed on prey, including fish, mollusks, and crustaceans. They are also known to eat seaweed and other plant material.

Lobsters are essential to both commercial and recreational fisheries. They are considered a delicacy in many parts of the world and are often caught and sold for a high price. However, overfishing and habitat destruction have led to declines in lobster populations in some areas, increasing the price of these crustaceans. 

Lobster is viewed as a high-end dish in many parts of the world, with a reputation for its rich and succulent meat, often enjoyed boiled, grilled, or steamed.

Differences Between Giant Crayfish and Lobster

Giant crayfish and lobster may look shockingly similar, but there are many differences between these two tasty sea-dwellers. The key differences between giant crayfish and lobster are size, habitat, lifespan, and appearance.


Lobsters can grow up to 60 centimeters (24 inches) long and weigh up to 6.4 kilograms (14 pounds), while giant crayfish can reach lengths of up to 80 centimeters (31 inches) but weigh less than lobsters, with some species weighing over 4 kilograms (9 pounds).


Giant crayfish are freshwater crustaceans in Australian and New Zealand rivers, streams, and lakes. Lobsters, on the other hand, are saltwater crustaceans and can be found in oceans worldwide. 

Lobsters are also commonly found in rocky crevices and near coral reefs, while giant crayfish prefer deeper pools and riffles in freshwater streams.


Due to their rarity and high demand, giant crayfish and lobsters can be expensive, with varying prices based on location, season, and availability. 

Generally, lobsters tend to be more expensive than giant crayfish, with some species commanding very high prices in specific markets. In addition, giant crayfish are only found in Australia and New Zealand, while lobsters are found worldwide. 


One of the biggest differences between crayfish and lobsters is their vastly different lifespans. In general, lobsters have a longer lifespan than most species of crayfish. Some species of lobsters can live up to 100 years, while others have a shorter lifespan of around 20 years. 

On the other hand, most species of giant crayfish have a lifespan of around 5-8 years, although some can live up to 20 years in the wild.


To any passerby, a basic giant crayfish and lobster are nearly identical. However, lobsters are a more varied species, so many look unique and completely separate from giant crayfish. 

For example, giant crayfish have neutral dark coloring like blue, green, and brown, but many species of lobster come in bright red, blue, or yellow-green. 

Frequently Asked Questions

Here are some frequently asked questions about the differences between giant crayfish and lobster. 

Do giant crayfish taste like lobster?

Giant crayfish taste relatively similar to lobster, though giant crayfish have a slightly sweeter and milder flavor than lobster, with a tender texture. However, the taste can vary depending on the species, preparation, and seasoning.

The texture of crayfish and lobster is incredibly similar. 

Is a lobster the same as a crayfish?

Lobsters and crayfish are both crustaceans and have a similar appearance, but they belong to different families and are not the same species. 

Lobsters are typically found in saltwater, while crayfish are freshwater creatures. They also differ in size, taste, and texture.

Are giant crayfish edible?

Yes, giant crayfish are edible and are considered a delicacy in some parts of the world, particularly in Australia and New Zealand, where they are native. However, they are not as commonly consumed as other crustaceans like lobster or shrimp. 

It is important to note that some species of giant crayfish are protected or endangered, so harvesting or consuming them is illegal.

Are crayfish mini lobsters?

While crayfish and lobsters share some similarities in appearance and belong to the same large family of crustaceans, they are not the same species. Crayfish are smaller than lobsters and are typically found in freshwater habitats, while lobsters are larger and live in saltwater environments. 

Additionally, the two have several physical and behavioral differences, such as their claws’ shape and hunting behavior.

More FAQs

What is the difference between a giant crayfish and a lobster?

The difference between a giant crayfish and a lobster lies in their physical characteristics and habitats. While both are aquatic crustaceans, lobsters typically have larger bodies and longer antennae compared to crayfish. However, both species share segmented bodies.

Can you eat big crayfish?

You can definitely eat big crayfish. These freshwater crustaceans have a delicate and sweet flavor. They can be prepared in various ways such as boiling, steaming, grilling, frying, or even consumed raw. The tail meat is particularly desirable due to its rich taste, but the claws, legs, and body are all edible as well.

What do giant crayfish taste like?

Giant crayfish have a sweet and firm flavor, distinct from fish, making them a popular choice for both tourists and those seeking a delicacy. These aquatic arthropods, belonging to the same clade as lobsters, exhibit some differences in comparison.

What is the biggest edible lobster?

The biggest edible lobster is the California Lobster, which can reach lengths of up to 24 inches. Approximately 95% of these lobsters are exported to China, where they are willing to pay up to three times more for them compared to local customers. These lobsters are known for their creamy, nutty, delicate, and sweet flavor profile.

What’s the biggest lobster called?

The largest species of lobster is called Homarus americanus, which can grow up to 1.1 m in length and weigh up to 20 kg.

Can crawfish get as big as lobsters?

Crawfish can indeed reach sizes comparable to lobsters. In terms of appearance, if you were to compare a crawfish to a Maine lobster, the primary distinction that would catch most people’s attention is their size. Interestingly, crawfish closely resemble miniature versions of lobsters. While crawfish typically measure between two to six inches in length, lobsters have the potential to grow beyond twenty inches in size.

Could a giant lobster exist?

A giant lobster could potentially exist, although it is rare due to various factors that limit their growth. However, there have been instances of massive lobsters being recorded. For example, in 2017, a lobster weighing 22 pounds, which had been kept for 20 years at a Long Island clam bar, was released back into the wild.

How big do giant crayfish get?

Giant crayfish can reach sizes of up to 400 mm in carapace length, although they typically grow to around 120 mm. They have a slow growth rate and can live for approximately 30 years. These crayfish are the largest known freshwater invertebrates, commonly weighing around 500g and occasionally reaching weights of up to 3 kg.

Do crayfish taste like lobster?

Crayfish do not taste exactly like lobster, but they have a flavor that is reminiscent of both lobster and shrimp. These crustaceans, also known as crawdads or mudbugs, resemble miniature lobsters and are found in freshwater environments such as rivers and marshes. Despite their name, crayfish are not fish but rather crustaceans. They have a slightly sweet taste that combines elements of both lobster and shrimp.

Is A crayfish the same as a lobster?

A crayfish is not the same as a lobster, even though they may have very similar appearances, because lobsters, rock lobsters, and crayfish do not belong to the same family.

Are lobsters just big crawfish?

Lobsters are not just big crawfish; however, they do share a resemblance in appearance. The main distinction that stands out to most people is their size. Crawfish, in fact, bear a striking resemblance to juvenile lobsters. While crawfish typically measure between two to six inches in length, lobsters can reach lengths exceeding twenty inches.

What is the biggest crayfish ever caught?

The biggest crayfish ever caught weighed an impressive 8.2 kg (18 pounds) and was caught in the waters off the coast of South Australia in 2013.

Can you substitute crawfish for lobster?

Crawfish can be used as a substitute for lobster because they have a similar appearance and a mildly sweet taste. They are commonly found in freshwater environments and are particularly favored as a seafood option in the Southern United States.

Can you eat crayfish?

Crayfish can be eaten. However, similar to other edible crustaceans, only a small part of the crayfish’s body is actually edible. Typically, in dishes like soups, bisques, and etouffees, only the tail portion of the crayfish is served.

Does lobster taste better than crayfish?

Lobster does not taste better than crayfish; however, both crustaceans possess a sweet and succulent flavor. The meat texture of both species is comparable, although crayfish tends to be slightly firmer. Some individuals argue that the taste of crayfish is more similar to shrimp rather than lobster.

Is crawfish cheaper than lobster?

Crawfish is indeed less expensive than lobster and is commonly enjoyed in more casual dining settings. Spiny lobsters, although biologically different from Maine lobsters and crawfish, are more costly and harder to come by compared to American lobsters.

Are crayfish just mini lobsters?

Crayfish are not just mini lobsters; although they share some similarities, there are distinct differences that distinguish them. Crayfish are smaller in size, exhibit different coloration and habitat preferences, and possess a different number of legs and claws.

Are crayfish more like shrimp or lobster?

Crayfish are more similar to lobsters than shrimp, as they belong to the same infraorder as lobsters. However, they differ from true shrimp at the Pleocyemata suborder.

Does crayfish taste fishy?

Crayfish does not taste fishy. Instead, it has a flavor similar to crab and shrimp – a subtle sweetness combined with a hearty, meaty taste. It is important to note that crayfish meat spoils quickly after the crayfish dies, so it should always be cooked while still alive. If you find that your crayfish has a fishy taste, it is likely not as fresh as it should be.

How big can crayfish get?

The size of crayfish can vary, with some reaching impressive lengths. For example, the Astacopsis gouldi species found in Tasmania can grow up to 40 cm in length and weigh around 3.5 kg (8 pounds). On the other hand, the smallest crayfish species, such as the Cambarellus diminutus found in the southeastern United States, only measure about 2.5 cm (1 inch) in length. However, most adult crayfish typically measure around 7.5 cm (3 inches) long.

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