Fish
Middle Miocene (Mohnian)
Aguajito Shale Member, Monterey Formation
Carmel, California, USA

73mm fish on 102mm slab.

It’s tough to find this much of a fish in the Carmel localities.  You’re lucky to find a partial string of vertebrae in a day.  A paleoichthyologist might be able to put a name on this one or at least identify the family.

See:
David, L.R., 1943.
Miocene Fishes of Southern California. Geological Society of America Special Papers. 43.