NJ Cretaceous Stream backbone??

[Fishinfossil]

Alright, last one for today! Picked up this concretion-ish piece and noticed the backbone type impression in it. I know its probably nothing, but danged if every time I look at it I see segmented vertebrae from a tail or something. I know this is wishful thinking, but what do you all think?

[Fishinfossil]

In this photo you can see the cross section where it's not a superficial marking on the rock, but its in the rock itself to a point.

 

 

[Fossildude19]

Concretion only. 

Not seeing vertebral column here. 

The individual "vertebra" are all different sizes. 

In an actual vertebral column, they would be similar in size as you move along it, with the posterior or caudal area showing narrowing. 

 

 

[Fishinfossil]

Thanks for the reply @Fossildude19