Big Brook, NJ - Fossil ID required

[Nanor]

These fossils were all found at Big Brook in New Jersey. From what I know, they should likely be from the Cretaceous period. I was unable to find much reference on what the following fossils may be. Anyways, thanks in advance! 
By the way, I didn’t want to upload too many photos at once, so please feel free to ask for additional photos of any of the specimens.

 

 

Edited August 12, 2022 by Nanor

[val horn]

you found alot of nice fossils.  The first looks to be a piece of unknown bone, the second I want to see more photos, the 4th looks like enchodus fang, and the last croc tooth.  The 3, 4 and 5 are less clear to me.  The 5th is too irregular for croc scute and may well be turtle but I want to see all of the sides.

[Nanor]

Here are photos of the second fossil and the fifth one. I was completely unsure of the second one, but I did think the 5th was an aquatic turtle. Also, do you think the last one could be a small mosasaur tooth (that’s what I thought it might be) or do you just think it’s a croc tooth?

 

[jonnyquest]

1 looks like a filled in burrow which broke.  3 is sawfish tooth.4 is from  ghost shrimp. 

[Nanor]

Thanks for your help!

[hemipristis]

#5 resembles an Enchodus sp. fish tooth, and #7 ba section of turtle shell

[hemipristis]

#2 could ea coprolite.  

[Rockwood]

2 hours ago, hemipristis said:

#2 could ea coprolite.  

The brooks are full of dark concretions. What do you suspect indicates coprolite ?

[Rockwood]

2 hours ago, hemipristis said:

and #7 ba section of turtle shell

There appears to be some confusion on the numbering here. If the second set of photos shows more views of the dimpled piece it doesn't look like turtle bone to me.