The size that ammonites could assume 400 million years ago

Is it dead?

BODE

You know what happens when you assume..........you make an ass out of ume.

That's not an ammonite that's an Omastar

Imagine that shit's tentacles brushing against your leg... *shivers*.
On a site note, I just quickly searched for "rule 34 - ammonite" and it doesn't exist. Given the potential of these squishies, I'm surprised.