Hash Tag

When you Post a Photo on Instagram you Type a Description for your Photo.

So if you Post a Photo of a very Big Fish you can Type
Do You Believe the Size Of This Fish in the Description Box.

But do you Type the Hash Tag in front like this
# Do You Believe the Size Of This Fish?

 

Refer to https://help.instagram.com/351460621611097

Numbers are allowed in hashtags. However, spaces and special characters, like $ or %, won't work.
So basically your hashtag needs to be one contiguous entity.
#DoYouBelieveHowSmartThisFishIs

 

Thank you for getting back to me.

So lets say I Post a Spooky Photo of the Woods.

I can call it
#SpookyWoods
I get this now.

Now if I come back in say 3. Days with a new Spooky Photo of more Spooky Woods do I have to keep the same Name?

I thought HasTages keep everything Grouped in the same Theme?

Or is this not how it works?