Crustaceans: Top 10 Biggest Crustaceans In The World

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Crabs, lobsters, prawns, and shrimps are the most well-known types of crustacean. They all belong to a larger group of other animals, called Arthropods, which also includes insects, spiders, and scorpions. The following is a list of the Top 10 biggest crustacean in the world which includes some pretty big crab, spiders, and lobsters:

10. Supergiant Amphipod

The supergiant amphipods are more than 11 inches long and thrive in lakes and oceans around the world. They are sometimes called the “insects of the sea.”

9. Parasitic Barnacle

The Parasitic Barnacle is one of the largest species of copepods, reaching up to 12 inches in length. They are mostly found around Antarctica and in western and northern parts of the Pacific Ocean.

8. Atlantic Horseshoe Crab

The Atlantic horseshoe crab, also known as the American horseshoe crab, is a species of marine and brackish chelicerate arthropod. Despite their name, horseshoe crabs are more closely related to spiders, ticks, and scorpions than to crabs. They can grow up to 24 inches in length, including the tail, and weights more than 4.8 kg (11 lb).

7. Giant Isopod

Giant Isopod is the largest member of the isopod family, a group of crustaceans closely related to shrimps and crabs. It is carnivorous and is a valuable scavenger, eating from the deep seafloor whatever falls from above, including bodies of whales, fish, and squid. They are abundant in the cold, deep waters of the Atlantic, Pacific, and Indian Oceans.

6. Tasmanian Giant Crab

Tasmanian giant crab is a very large species of crab that resides on rocky and muddy bottoms in the oceans of Southern Australia. The Tasmanian giant crab is one of the largest crabs in the world, reaching a mass of 13 kilograms (29 lb) and a carapace width of up to 18 inches. Males reach more than twice the size of females.

5. Giant Colossae Sea Spider

Giant Sea Spiders get their name from their size (35 inches), as one of the largest Sea Spiders in the deeper oceans. They can be found in almost every ocean, from shallow depths down to over 7000m.

4. Coconut Crab

The Coconut crab is the largest land-living arthropod in the world and with a weight of up to 4.1 kg (9.0 lb). It can grow to up to 40 inches in length from leg to leg. They are mostly found on islands across the Indian Ocean, and parts of the Pacific Ocean as far east as the Gambier Islands and the Pitcairn Islands.

3. American Lobster

The American lobster is a large crustacean with two large, unequal sized claws used for feeding. American lobster can reach up to 43 inches long and weigh as much as 44 lb (20 kg), making this the heaviest crustacean in the world. They are mostly found on the Atlantic coast of North America, chiefly from Labrador to New Jersey.

2. Alaskan King Crab

There are three types of this Alaskan King Crab: Red King Crab, Blue King Crab, and Golden King Crab. They can weigh more than 20 lb (9.1 kg) and more than 60 inches in size. They can survive up to 20 years.

1. Japanese Spider Crab

The Japanese spider crab has the largest leg span of any arthropod in the world, reaching up to 150 inches long, and weighing up to 41 pounds (19 kg). It is the subject of the fishery and is considered a delicacy in Japan.