But no man has ever seen the giant squid alive.
He is best remembered for his research on giant squid.
If true, this image would represent the first known photograph of a live giant squid.
Until 2005, nobody had ever seen a giant squid that was alive.
He considered great white sharks and giant squid, but they'd been done.
However, in 1861, a French ship was able to bring back parts of a giant squid so scientists could study them.
So David had stayed dead, probably still in the belly of the giant squid.
Giant squid have eight short arms and two long tentacles.
That means more giant squid could float the surface, where they would die.
A giant squid's eyes are each about the size of a watermelon!