The top three largest crabs in the world are the killer crab, the Tasmanian deep sea giant crab, and the Alaskan king crab.

Killer crab

The killer crab is a species of spider crab, which is also known as the Japanese spider crab or the tall crab, and it is the prototype of the giant mitten crab, which is mainly found in the northwest Pacific Ocean. The killer crab is the largest surviving crustacean in the world, and the giant mitten crab is the only one left in this genus. The overall length of the killer crab can reach 4.2 meters, the average length of its foot spread is about 2.5 to 3 meters, the back four feet are about 2.1 to 2.4 meters, the width of its shell is about 25 to 33 meters, and the weight of the whole crab can reach 19 kg.

Tasmanian Deep Sea Giant Crab

The Tasmanian giant crab is also very large and it is known as one of the largest and meatiest crabs in the world. The Tasmanian giant crab can reach a length of 3.8 meters and a weight of 13 kg, with a foot as big as a man's arm.

Alaska King Crab

The Alaskan king crab, also known as the king crab, is also known as the Echizen crab, the cod farm crab, and the Kamchatka anthropomorphic stone crab. The king crab is not a true crab, it is a crustacean of the stone crab family, the only crab that can crawl both horizontally and vertically, and is mainly found in colder waters. The king crab is huge, with an average length of 2.2 meters, a shell width of 28 centimeters, and a weight of 10 kilograms, making it the "king of crabs".