whats these things on these snapper bones ?

whats these things on these snapper bones ?

cause this snapper  yesterday cooked and got its bones and was wondering what these things were on the bones ?

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Names matt 


Posts: 39

Date Joined: 06/07/11

hyperostosis

Mon, 2011-09-12 19:58

dont know much about what it is actually, something about injuries healing badly

grantarctic1's picture

Posts: 2546

Date Joined: 03/03/11

Common

Mon, 2011-09-12 20:01

Yeah its common on lots of species, nothing to worry about tho .

mw87's picture

Posts: 123

Date Joined: 20/07/11

Ive always wondered what

Mon, 2011-09-12 21:39

Ive always wondered what caused these. It was common on fish where I grew up on the East Coast as well. If anyone knows exactly it would be interesting to finally find out!

carnarvonite's picture

Posts: 8622

Date Joined: 24/07/07

Post

Mon, 2011-09-12 21:51

This subject came up not long back and there was a detailed response on how and why they happen.

fisho-ron's picture

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mate, you guys made the most

Mon, 2011-09-12 21:58

mate, you guys made the most out of that pinky!!

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Date Joined: 03/05/06

hyperostoses

Mon, 2011-09-12 22:33

In humans it is called Bony Exostosis
Wed, 2011-08-10 17:12

In fish they are similar. Googling Exostosis snapper I found this:

My partner recently brought home a large snapper that was caught off the coast of Adelaide, South Australia. When we had finished devouring the delicious fish I noticed that the skeleton had some unusual deformities on the backbone (see photos) in the form of three hard, bony spheres.My partner claims not to have seen anything like it before, and my rudimentary internet search produced no pictures of fish skeletons with similar features. Can someone tell whether these are a normal part of the snapper morphology or an abnormality?Tegan Laslett, Adelaide, South Australia
 

"fish hyperostoses. They are not uncommon in older specimens of the snapper Sparus auratus and are also reported in 92 other species of marine bony fish in 22 families. Hyperostoses take the form of regular, cellular swellings in otherwise thin, acellular bone, such as vertebral spines or the thin bones of the skull. In each species they generally occur in the same specific places.The Australian old-man snapper that the questioner enjoyed so much is characterised by a bony knob or casque on the back of the skull, which is another example of hyperostosis. Fish hyperostoses also occur as fossils (sometimes called fossil brains by collectors), and have been the subject of research for a long time. They are often known as "Tilly bones" by palaeontologists, after the palaeoneurologist Tilly Edinger (1897-1967), who made them a special interest.Hyperostoses do not seem to inconvenience the fish and are apparently not pathological, but their purpose is uncertain. However, because they occur only in tropical and subtropical marine fish (plus a few temperate species such as the snapper), and a couple of species of freshwater fish in hypersaline environments, it is thought that they may play some part in calcium regulation.Neville Pledge, South Australian Museum, Adelaide, Australia"

Breaking some scientific words down: Hyper = over or bigger, -ostosis = pertaining to bone, a problem or pathology.

Hope that helps. Out of interest surfers or swimmers in cold water get a similar problem in their ears called surfers ear.

Neels

keef's picture

Posts: 143

Date Joined: 26/03/10

see alot of of this in the

Thu, 2011-09-15 15:56

see alot of of this in the local pinks i fillet at work.. never present in the imported pinks from N.Z though, also quite common in big chinaman leatherjacket

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Its how Pink Snapper get

Thu, 2011-09-15 20:11

Its how Pink Snapper get their bumps on their heads etc..

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Sand_whiting's picture

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Date Joined: 21/07/12

Probably a growth or

Sat, 2013-10-19 20:49

Probably a growth or something. 

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