Answer:

NEMO

Answer	Crossword Clue
NEMO	"Nautilus" captain
NEMO	Nautilus master
NEMO	Sci-fi sub captain

NEMO	Verne captain
NEMO	Verne character
NEMO	Storied captain
NEMO	Captain of the Nautilus
NEMO	Clownfish
NEMO	Jules Verne captain
NEMO	Jules Verne's captain
NEMO	Movie fish

NEMO	Fictional captain
NEMO	Nautilus captain
NEMO	"Finding ..."
NEMO	Nautilus skipper
NEMO	Sub captain
NEMO	Name from Verne
NEMO	Verne skipper
NEMO	Adventuresome captain

NEMO	Clownfish of Pixar
NEMO	Pixar clownfish
NEMO	Clownfish of film
NEMO	Lost fish of film
NEMO	"Finding .."
NEMO	Literary captain
NEMO	"Vingt mille lieues sous les mers" captain
NEMO	1954 Mason role

NEMO	Verne's captain
NEMO	"Finding ..": Disney film
NEMO	Fictional seaman
NEMO	Sci-fi captain
NEMO	Verne's skipper
NEMO	Winsor McKay's "little" comics character
NEMO	Pixar fish
NEMO	"Finding ..": Pixar film

NEMO	Film fish
NEMO	Marlin's lost son, in a Pixar film
NEMO	Verne megalomaniac
NEMO	"Mysterious Island" captain
NEMO	Animated clownfish