How to get to sparkplug? And what type of sparkplug mates into honda cbr 250r 2011 without abs

Hi, I was trying to find a candle. I removed the left side and found out what was in the picture. In the videos, he arrives at the spark plug through the tank. So is it a spark plug or not? I'm sorry I'm an amateur: D

I would also like to ask what type belongs to the motorcycle honda cbr 250r 2011.

IRIDIUM IU24A is that so?