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
