....oh and something around the 'guard' - dazzlenation and in relation to how people can turn 'ugly' i.e. what can trigger them etc etc....see previous posts....go figure:

Gonioteuthis quadrata (Blainville, 1827) guard with a zigzag-like deformation - photo vs. MRI - Belemnitida - Wikipedia

Dazzlenation (tumblr.com)