Yes
yes a millipede is an invertabrate. :)
Yes, a fly is an invertabrate; it has no backbone.
Your answer is in the question. Crayfish are invertabrates.
yes it is an invertabrate but it has an exto-sceloton
Invertabrate.
most things living are referred to as animals, bar plant life yet the word animal is stripped into different forms such as mammal, invertabrate etc and sea slugs do not have a back bone to my knowledge and therefore are invertibrates.
No
no
yes
yes
No it is an Invertabrate
rifle slug regular slug