Skip to 2:34 to see that he actually radios Robin to bring the Shark Repellent Bat Spray from the RACK OF OCEANIC REPELLENT BAT SPRAYS IN THE BAT COPTER.
Don't think that this is a one-off however, this film is chock full of excellent scenes along similar lines, just look up "Sea for Catwoman" or "Some days you just can't get rid of a bomb". Anyone who thinks this isn't a timeless and excellent action-comedy film isn't getting the joke.
I actually feel the same way about "Batman and Robin", but have a harder time convincing others.
(, Mon 1 Dec 2014, 17:57, Reply)