u/Dante9000X

So I came a shot video where it tell mayfly have shortest life cycle and they just reproduce and die they don't have mouth to eat.

So the question I have is if they don't eat then where does the energy come from, for there journey to up steam and for egg to get hatch?

Link of the video

https://youtube.com/shorts/y3djjhe891Y?si=SzOW3kvdGEzl0Xjl

Sorry for the english and I just came to this

So sorry in advance if I break any rules