Let’s embark on an underwater journey to discover the top 5 largest crabs in the world. These colossal crabs are indeed the titans of the ocean floor, each boasting impressive sizes that make them a sight to behold.
1. Japanese Spider Crab – The Undisputed Behemoth
The Japanese Spider Crab (Macrocheira kaempfer) leads the pack of the top 5 largest grabs in the world. Its leg span can reach up to 12.5 feet from claw to claw โ larger than many humans!
Native to the deep waters surrounding Japan, this crab’s body may seem small, but its extraordinarily long legs make it the largest crab species in terms of leg span. Its unique appearance, with a round body and spindly legs, gives it an almost otherworldly look, akin to an underwater spider.

2. The Mighty Tasmanian Giant Crab
The Tasmanian Giant Crab (Pseudocarcinus gigas) is known for its hefty weight and gigantic claws, easily giving it top 5 status. It’s native to the southern waters-to-contrast ratio than the Japanese Spider Crab; this monstrous creature can weigh up to 39 pounds and measure up to 18 inches in carapace width.
Their claws are so powerful that they can break through shifts depending on the size of the prey.
3. The King Crab – A Regal Giant
The Red King Crab (Paralithodes camtschaticus) is a well-known giant among crustaceans, famous for its meat. With a leg span of up to 5.9 feet and a weight of up to 28 pounds, this crab is a formidable presence in the Bering Sea and the northern Pacific Ocean.
Its spiny exoskeleton and robust claws make it a formidable predator in these icy waters.

4. The Snow Crab – A Cold Water Colossus
The Snow Crab, also known as the Queen Crab (Chionoecetes opilio), is a species that prefers cold waters, with a distribution that spans the northern Pacific and Atlantic Oceans.
Although not as large as its King Crab counterpart, the Snow Crab can still reach an impressive 5.5 feet in leg span and up to 5.5 pounds.

5. The Coconut Crab – The Terrestrial Titan
Last, we must mention the Coconut Crab (Birgus lat Nissan). This giant can reach up to 3 feet in length, with 16 years, to the top five largest crabs in the world. Unlike the other species discussed here, this crab dwells on land and can climb trees.
Their sheer size and unique adaptations represent crustacean diversity, giving us a glimpse into the fascinating world beneath the waves and even on land.

The world beneath the sea is a mystery to many, filled with many vibrant life forms and intriguing oddities. Among these, crustaceans are a particularly intriguing group, with crabs being some of the most fascinating creatures due to their diverse sizes, unique adaptations, and vast distribution.
Remember, while these crabs might seem like monsters, they are an integral part of the marine ecosystem, contributing to the balance of life beneath the waves.