If several fish are swimming in one of the images.
return fish ;return #1 that are swimming ;return images ;return the  number of  #2 for each  #3 ;return #3 where  #4 is higher than one ;return the  number of  #5 ;return if  #6 equal to  one
['select', 'filter', 'select', 'group', 'comparative', 'aggregate', 'boolean']