This is general information about production inconsistences, mistakes and external references related to the episode The Laughing Fish from season one of Batman: The Animated Series.
In the episode, Harvey Bullock knows the existence of the Batcomputer, but how he learned of it exactly is unrevealed. It's possible though he just might have been referring to a computer used by Batman as a "Batcomputer" akin to the 1960s TV series habit of everything having a bat-prefix.
Joker's mention of "Colonel What's-his-name" is a reference to Colonel Sanders, the founder of Kentucky Fried Chicken. Later in the episode, he mentions another plan that would create a "happy meal", referring to the children's meal package from the fast-food chain McDonald's.
When Joker says, "Oh, trying to cheat the Joker, are ya?" to Mr. Francis and the tune he makes before closing the shark tank are imitations of Curly from The Three Stooges.
Inconsistencies[]
When Batman fires his grapple gun at the ceiling of the aquarium, the "clink" of the grapple catching is heard while the wire is still wrapping around the pole.
When Joker starts reeling Bullock back up, he winds backwards (as he should), but when we see him doing this from up by Bullock, he's winding it forward.