The surprising discovery of well preserved bite marks on the bones of the ichthyosaur's lower jaw were made during painstaking cleaning and reassembly of its skeleton in the laboratory. Evidence of advanced healing indicates that the animal survived the attack and lived on for some time afterwards.Science Daily's link to the journal article is presently not working, but you can find the whole paper right here:
... The size and spacing of the tooth marks do match any potential predators or prey. Rather, they are most consistent with another adult ichthyosaur, suggesting that the wounds were inflicted during combat over food, mates or territory.
Zammit and Kear. 2011. Healed bite marks on a Cretaceous ichthyosaur. Acta Paleontologica Polonica doi:10.4202/app.2010.0117
Feedback? Email me at toddcharleswood [at] gmail [dot] com.