HAHAHAHA that’s Sidon for ya! The man has the spirit of a thousand puppies!
It seems like Sidon becomes really EAGER when he see’s a hylian near by. I believe the reason has to be because of his first encounter with Link. Also, there’s barely any hylians who tour by the zora’s domain due to the obsessive rainy weather so it’s quite rare for Zoras to encounter Hylians.