Kosmoceras spinosum

Birthday gift for friend/co-worker. I rarely draw them but I am quite good at cepholopods.

This is a Kosmoceras spinosum, and the result of googling for the prettiest/most interesting ammonite shell I could find. Once I did, I googled some squid and similar for inspiration for color patterns and tentacle/arm arrangements.

At the lower right you will see a scale bar. According to google, that is the actual shell size (~2.2cm)