The term CAPTAIN NEMO CREATOR is composed of four crossword solutions: VERNE (5 letters), NAUTILUS (8 letters), NED (3 letters), and JULESVERNE (10 letters). VERNE and JULESVERNE refer to the French author Jules Verne, who wrote the 1870 science fiction novel 'Twenty Thousand Leagues Under the Sea'. The novel features a mysterious captain named Nemo, who commands a submarine called the Nautilus. NED is an acronym for the novel's protagonist, Professor Pierre Aronnax, whose nickname is NED Land. Therefore, Jules Verne is the creator of Captain Nemo and the Nautilus.