If each image shows one big jellyfish, and only one of the jellyfish pictured has long ribbon-like tentacles trailing downward from a dome-shaped 'cap'.
return jellyfish  ;return #1 that are big ;return images ;return number of  #2 for each  #3 ;return #3 where  #4 is equal to  one ;return number of  #3 ;return number of  #5 ;return if  #6 is equal to  #7 ;;return tentacles of #1 ;return #10 that are ribbon-like ;return #11 that are long ;return 'cap of #1 ;return #13 that is dome-shaped ;return #12 that are trailing downward from  #14 ;return #1 that has #15 ;return number of  #16 ;return if  #17 is equal to  one ;return if  both  #8 and #18 are true
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