Wat is goku and Vegeta looking at in this pick, and wat episode is it frome?

its from the end of fusion saga when goku and vegeta were inside super buu and when they see a giant insect or slug(whatever it is) talking .

They're looking at huge worms inside of Buu's body the episode number is 158 The Innards of Buu

Its from the kid buu saga closer to the end I think. thats all i know

inside buu s body

i really dont know but lol :D