Eli5 do animals that wait for their prey to come to them, also get 10 percent of energy from the animal that they eat?

Question

In school I was taught that you when you eat something on you only get 10% of the energy because 90% percent is used, looking for the food or other things. If this is wrong an explanation would be awesome.

In: Biology

Answer 1

Any random number applied to that many forms of life is bound to be wildly inaccurate.
My guess the teacher was trying to make a point that energy from different types of food is relatively low.