McFadden Beach find

[Sharktoothaddict]

Found this a couple summers ago on a beach trip and completely forgot I even had it but I have no idea what it actually is. It has become a little brittle and after dropping it it broke on the pointed end. Can someone help identify this find thanks in advance!

[Brett Breakin' Rocks]

2 hours ago, Sharktoothaddict said:

t has become a little brittle and after dropping it it broke on the pointed end. Can someone help identify this find thanks in advance!

Hi There,

Something for scale (a ruler) in the future and a few more shots would be nice but this looks like a fish Tilly bone.  A bone suffering from hyperostosis (swelling)

 

Here are some modern versions ..

 

Cheers,

Brett

[Harry Pristis]

I see how it could be a Tilly bone, but I'm leaning toward it being a beach-worn ray dermal dentical.  The point of the spine appears to be worn away, but the base of the spine is evident (the knob end of the toothy spine).  I'd guess this is a denticle from the body, not the tail.  The elongate callus-like root supported the elongate enameloid spine.  Just my opinion.

[Coco]

Hi,

 

9 hours ago, Brett Breakin' Rocks said:

Hi There,

Something for scale (a ruler) in the future and a few more shots would be nice but this looks like a fish Tilly bone.  A bone suffering from hyperostosis (swelling)

 

Here are some modern versions ..

 

Cheers,

Brett

Brett Breakin' Rocks, where are these faulty bones placed on fish ? I’ve always been intrigued by the ones I see on TFF, I’ve never seen them in real life.

 

Coco

[Brett Breakin' Rocks]

8 hours ago, Coco said:

I’ve never seen them in real life.

 

Coco

Hi Coco,

 

I've got some fun images that I found with modern fish. They are at home, I'll send them along tonight !

 

Cheers,

Brett

[Harry Pristis]

I find this paper interesting and easy to read:

 

 

tilly bones W. J. Tiffany et al. 1980. Hyperostosis in Florida fossil fishes. Florida Scientist 43(1) 44-49 (1).pdf

[Brett Breakin' Rocks]

15 hours ago, Coco said:

Brett Breakin' Rocks, where are these faulty bones placed on fish ?

If is a Tilly bone it may be a swollen fin spine or something similar .... here are just a few images.

 

Image Credit: Brigham Health Hospital

 

Image Credit: Fish Anomalies in Fishes from the Port of Jubail

 

Image Credit: CASE_OF_HYPEROSTOSIS_IN_THE_SILVER_BREAM_Pagrus_auratus_FORSTER_1801

 

 

 

Cheers,

Brett

[Coco]

Thanks Brett ! If I understand correctly, these are mainly bone growths on the bones. It’s incredible ! The fishes affected by this problem have to suffer and be embarrassed in their swimming !

 

Coco