i noticed on my boat that the only part of the floor that flexes when i walk on it is the area between the seat at the front of the console and the raised front deck. this is a small area that looks to be over the gas tank?
 
i am a little on the portly side 

 so i am sure a normal weight person would not feel it like i do.. all other floor areas are solid.
 
i put my hand in there as far as i could from under the console and it just feels like foam between the fiberglass floor and the tank. i hope to get a better look when i take out the center console.
 
is this how it was made? seems like they would put something a little stiffer there for floor support.
 
anyone else encounter this?