Here it is, top 10 largest invertebrates in the world.
Japanese Spider Crab
The giant weta, Deinacrida heteracantha, of Little Barrier Island in New Zealand are the heaviest insects in the world. Deinacrida means ‘terrible grasshopper’ though these giant weta bear only the most passing resemblance to grasshoppers. The largest specimen weighed 71g, and some can be over eight inches long. This is an example of island gigantism as the weta have adapted to fill biological niches filled by small land mammals elsewhere in the world. Giant weta feed mostly on vegetation but their powerful mandibles can give a painful bite, but this is very uncommon. D. heteracantha is now limited to just Little Barrier Island but other weta are common in New Zealand. Peter Jackson named his special effects company after weta, and in his King Kong, enormous predatory weta are amongst the creatures lurking in a ravine.
Locusts are giant grasshoppers, there is no real difference between locusts and grasshoppers, only in their swarming ability and size. This entry may leave me open to an accusation of British bias, as other countries will be far more familiar with locusts, but they are larger than you think. I worked with locusts while studying their jumping mechanism, and they are very disconcerting animals. When they fly they make a loud buzzing noise, and when they land on your clothes their feet latch heavily into the fabric making them very hard to dislodge. Being caught in a swarm of them must be very unpleasant. Swarms of locusts can contain billions of individuals, and consume millions of tons of crops as they pass.
Lion’s Mane Jellyfish
Goliath Bird-eating Spider
Giant Sea Spider
Asian Giant Hornet
source : http://listverse.com/2011/09/25/top-10-unnervingly-large-invertebrates/
tag : largest, animal, invertebrates, insect, squid, centipede, hornet, spider,