bwl's picture

Fish jaw?

Observed: 11th April 2012 By: bwl
fish jaw 002
fish jaw 003
Description:

Found on a beach in Northumberland, not sure what this came from- suppose fish/shark of some kind? Teeth backward pointing. the 'bone' of the jaw is very cartilaginous. Any help much appreciated!

Identifications
Species interactions

No interactions present.

Comments

bobthebirder's picture

Jaw

Must be a shark with such conical broad-based teeth

Bob Ford

BDeed's picture

Shark!

I agree with Bob that this is part of a shark jaw, can't seem to find much in the way of decent or local online resources for id by teeth (for recent sharks at least, plenty for fossils!) the closest i got seemed to be a Mako which was one of the few with unserrated curved teeth, the hammerhead also seemed very loosely similar.

No idea what either would be doing around here though! I would suggest trying your local museum?

mattprince1969's picture

Shark teeth

None of our (known) sharks have smooth, broad-based, recurved teeth, without serrations, at least not until you get to a decent sized mako (which this isn't from the 50p scale). At this scale the teeth from a mako would be much finer.

Most of the smaller sharks (tope, dogfish etc) have distinctive shaped, often serrated teeth.

Sharks should have multiple sets of teeth in any jaw fragment.

A google search for "conger eel jaw british museum" images should bring up an interesting weapon made from a conger eel jaw which looks similar.

bobthebirder's picture

congers

Well, none of the congers I've ever caught, or seen, had teeth anywhere near as big as this! I suspect the museum specimen is incorrectly labelled. Or even more likely the name conger means something else in the Gilbert Islands where the specimen came from, moray eel perhaps.

Bob Ford