fuel filter Protege 99 LX touring edition
 

stopped by Mazda dealer and they are saying " pretty sure that there is only filter together with pump inside the tank".
Question: what is round cylinder ( diameter apx 3", length 4") underneth trunk on left side?
answer: "probably somethink for emmisions"

I am really confused, because I see there rubber hoses going in and out and for me it looks like fuel filter.

Should I bellieve this proffesional?

Thanks for input