Animals without a backbone or spinal column.
Tarantula: Although many people find the tarantula scary, it generally is harmless to humans. They will only bite unless you bother them, and if you get bitten it feels like a bee sting. Some are even becoming a popular pet.
Shrimp: Shrimp have 8 pairs of legs, 5 for swimming and 3 for eating.
There are about 300 different species of octopus
native to many of the world's oceans especially coral reefs.