Wildlife Spotting

Bony fish skull https://virtual.imnh.iri.isu.edu/Osteo/Bony_Fishes/15

this site could be useful if it was a mammal http://www.museumofosteology.org/museum-education/6/How-to-Identify-a-Skull.htm If it is a reptile (alligator, snake, ect. ) it could be harder to identify If it is a cartilaginous animal (fish) it will be very hard to pinpoint the species

it appears to be the skull of a aquatic animal. can you tell if it is cartilage or bone once you figure that out you know which path to take.

Size????