question: If all jellyfish are at least partially above the water surface.
#1 return jellyfish 
#2 return water 
#3 return surface of #2 
#4 return #1 that are above #3 
#5 return #1 that are partially above #3 
#6 return #4 , #5 
#7 return number of  #1 
#8 return number of  #6 
#9 return if  #8 is equal to  #7