No, they are invertebrate creatures.
No they do not
No, leaches are from Phylum Annelida and Class Hirudinea, which is completely separate from Phylum Mollusca.
go on the internetfind out what you needgo buy the stuff you needgo kill the leaches
No
leaches
you could drain the pool, but if you don't want to drain your pool, you could get a pool skimmer and get all of the leaches out of your pool and then carry the leaches to a near by sewer, or a murky pond/lake/river.
yes
Yes, blood.
yes
They thought there were "vapers" in the blood so they used leaches to remove them.
No, raccoons do not have spines. Porcupines have spines.
Yes people have spines.