Hyperparasite
en.wikipedia.org
en.wikipedia.org
"The entomologist E. O. Wilson has characterised parasites as "predators that eat prey in units of less than one""
(I suppose, due to this, "hyperparasite" is even less going to be clearly defined than this.)
Another comment says "parasites that subsist on the food consumed by the host rather than the host itself". That is also seems to be a good point too; how to handle that consideration, too?
To your second consideration, some and perhaps all souls practise autophagy (via computation)
(0)"The practice of spreading the whale out among many people is based in the Buddhist principle that it's better to sacrifice a single soul to feed many than to kill many animals to feed one person."
(0)http://www.laobserved.com/biz/2010/03/a_taste_of_whale.php
So, Nat'ralists observe, a Flea
Hath smaller Fleas that on him prey,
And these have smaller yet to bite 'em,
And so proceed ad infinitum
https://en.wikipedia.org/wiki/Siphonaptera_(poem)Also does this exist?
I do know snakes occasionally eat themselves. There are pics of this online.
So, Nat'ralists observe, a Flea
Hath smaller Fleas that on him prey,
And these have smaller yet to bite 'em,
And so proceed ad infinitum.
Swift, “On Poetry” (1733), https://en.wikisource.org/wiki/The_Works_of_the_Rev._Jonatha...Thank you!