Few odd items off local beach post #2

[Ground_Hog_MD]

Got a few sharks teeth over the past week or so, and a few odd items i could use a little help ID`ng
photo 7-8-9 it appears to be a sharks tooth, but is taller and shaped different than any i have ever found, it has a high center ridge.
and almost perfect sides. unsure if it is a sharks tooth or not.
and photo 10-11. appears to be some kind of flat tooth but i cannot ID it.
thank you for any help ... H.H.

 

[KinTN]

7,8,9) all are shark with the 2 leftmost being sand shark. I cant rem the 3rd one (I want to say a part of an extinct mako shark tooth).
10,11) don't know that I've ever seen those fossils.

 

[Ground_Hog_MD]

thank you, the two on the left #9 are just for comparison. it was the one on the right #7-8 that looked very odd.
and # 10-11. ... ... ... H.H.

 

[KinTN]

Yeah, thought you did, but wanted to put it in there for anyone who might not know and to lessen any possible confusion about what I was saying.
I have picked up some of those #7/8'son the Venice Fla beaches looking exactly like that and always thought they were mako tooth tops. As always, if someone can correct me, I'm always up for some lairnin. (and I Really hope you get a good ID on that weird thing in your other post)

 

[GTzer]

#10- drum fish teeth