After defeating the Siren, Heracles buried her body beneath those reefs, taking only her throat bone as a keepsake.
This wasn't due to any peculiar hobby of his, but rather the Siren's own wish.
Knowing she was doomed, the Siren left her final words.
"You who call yourselves just humans... You kill me for slaying innocent crew members, but do you truly dare to punish those real culprits behind it all?"
"If you dare, then I will acknowledge your justice."
"But if you don't, you're just another coward who bullies the weak and pretends to be righteous, a hypocrite."
Heracles did not respond to the Siren's last words.
He simply took the Siren's throat bone, letting it bear witness to his future experiences.
Hearing is uncertain, seeing is believing.
Although he had heard many stories about the gods from others, Heracles himself had not seen them even once.
