By "bug", I assume you just mean "insect". (Technically, a bug is a specific type of insect.)
You haven't provided nearly enough information. Your best bet is to visit your local college's Biology department and see if you can describe it to someone there; most science professors are actually happy to see people take enough of an interest in their field to spend a few minutes trying to help you figure it out unless they're really busy (finals week, for example, would be a bad time to do this).
Crayfish have antennas but really big, once you land them you will realise they have really big antennas.
Hermit crabs can't see really well with their eyes so they have antennas to feel whats around them and to communicate.
Yes there is. But its not really a shrimp, its a Crustacean. Its called a mantis shrimp because it strikes like a mantis and because its in the same family as true shrimp.
HUMANS, nothing else really.
I don't really know at all
No, but don't be fooled. The praying mantis looks like it's praying.
The Praying Mantis dosen't really own an "Element", for all we know it could bring good and/or bad luck.
No not really. They are a really self protective creature. They will only have a partner for mating.
An especially noisy type of grasshopper is known as a katydid. Katydids make an extremely loud noise at night. Some people really enjoy this sound and use it as background noise when they go to bed.
The grasshopper cannot be found in the leaf litter habitat cuz it is not a suitable place and the environment is different from the field habitat
Caterpillars use their antennae to help them find food because they don't have really good eyesight.
the grasshoppers ears are located next to their eyes