The Japanese spider crab (Macrocheira kaempferi) is the biggest crab in the world by leg span, reaching over 12 feet (3.7 meters) from claw to claw, making it the largest arthropod ever, while the heavy, stocky Tasmanian giant crab is a contender for the heaviest, with the land-dwelling Coconut crab being the largest terrestrial arthropod. Despite their fearsome look, spider crabs are gentle scavengers found in deep waters off Japan, known for their long legs and massive size.
Either way, a steady diet can assist certain crab species in growing to incredible sizes. The biggest crab in the world, the Japanese spider crab, is capable of achieving a leg span of more than 13 feet (4 meters) across.
The Tasmanian giant crab is one of the largest crabs in the world, reaching a mass of 17.6 kg (39 lb) and a carapace width of up to 46 cm (18 in). Among crabs, only the Japanese spider crab (Macrocheira kaempferi) can weigh more.
While Japanese spider crabs have the title of largest crab, they also may have the longest life span as they have been known to live to be as old as 100 years! #mysticaquarium. How big is the king crab in comparison ???
Colossal Alaskan king crab legs are slightly larger than the giant king red crab legs, with each leg weighing approximately 0.72 pounds. Maine Lobster Now's colossal Alaskan king crab legs are an excellent choice if you're looking for a little more meat than the red crab legs.
As of 2024, the king crab price per pound typically ranges between $30 and $60, depending on the size, quality, and where it's purchased. These prices reflect the costs for the red king crab variety, which is the most commonly consumed and highly prized.
Fishermen and scientists were alarmed when billions of crabs vanished from the Bering Sea near Alaska in 2022. It wasn't overfishing, scientists explained — it was likely the shockingly warm water that sent the crabs' metabolism into overdrive and starved them to death.
The aptly named Toxic Reef Crab (also referred to as the Devil Crab), Zosimus aeneus, can be so toxic as to kill within a few hours of consumption and has been reported to be used by Pacific Islanders as a means for suicide.
Coconut crab front claws have a stronger pinch than any bite force in nature, including carnivores! During one study, researchers measured the pinching force of a coconut crab at around 1,800 Newton, which is around 183 kilograms (i.e. they could easily chop your finger off!)
Dungeness crab is one of the best crabs to eat since it has large, meaty legs like King crab. The sweet, flaky meat inside one whole crab can serve two people, making it the perfect meal for a romantic dinner with your significant other.
Coconut crabs' broad diets have even led some to suggest that the reason famed aviator Amelia Earhart was never found opens in a new window when she disappeared mid-flight over the Pacific Ocean in 1937, was because she was devoured by coconut crabs after perishing on Nikumaroro island.
The Tasmanian giant crab is one of the largest crabs in the world. It has a triangular-shaped, orange-red shell with cream flecks and very developed front legs and claws with black tips.
Japanese spider crabs can live for up to 100 years. Big Daddy (not shown) died peacefully at 80.
The massive leg span of the Japanese spider crabs make it the world's largest living crab. The carapace (main body cavity) of the Japanese spider crab is 12 inches (30 centimeters) across. But its legs, which continue to grow even once it reaches adulthood, can span up to 12 feet (3.8 meters) from claw to claw.
New Zealand is well known for giant marine crab fossils; hundreds of specimens of the species Tumidocarcinus giganteus have already been found, and adults of this species had a body averaging about 14 centimeters (six inches) across.
These are the extra large (XL) male crabs, coming in at 6 1/4+ inches from point to point. Big boys.
Alaskan crab fishing, though, is specifically even more dangerous, with over 300 fatalities per 100,000 per year. Over 80% of these deaths are caused by drowning or hypothermia. The fishermen are also susceptible to crippling injuries caused by working with heavy machinery and gear.
Advocates for Animals, a Scottish animal welfare group, stated in 2005 that "scientific evidence ... strongly suggests that there is a potential for decapod crustaceans and cephalopods to experience pain and suffering".
Xanthid crabs are often brightly coloured and are highly poisonous, containing toxins which are not destroyed by cooking and for which no antidote is known.
Out of eight red king crab fisheries in Alaska, only three—Bristol Bay, Norton Sound, and recently Southeast Alaska—are active, if much smaller, fisheries. Researchers cite overfishing of the declining stock and environmental changes for the collapse.
Ghost crabs are relatively common on beaches like Assateague National Seashore, but they, like many other coastal creatures, are threatened by human impacts. One of the main threats to ghost crabs are off-road vehicles (ORVs).
The Japanese spider crab is a large catch for any fisherman. With a leg span of 13 feet (4 meters) and an average weight of around 40 pounds (16-20 kg), it claims the title of largest crab. It may also have the longest lifespan of any crab, living to be 100 years old.