Awson said
I don't understand.Why am I looking at a submerged, super close-up of some guy's hairy nutsack?
mdk said
I should clarify. Those are sea snakes, one of the most deadly venomous creatures on earth.
Those are garden eels. They hide in the silt with only their heads out so that they can retreat from predators at a moment's notice. Their swaying movement helps them catch drifting food particles in their mouths. Sea snakes need to surface to breath, so they would never be able to partake in this lifestyle. The potency of their venom is specifically designed to hunt for fast-moving prey and they often have warning patterns to alert predators of their venom, so they don't have to hide either.
Some of us also harbour an interest in aquatic biology, believe it or not.