B:TB&tB season 2 episode 4 "Aquaman's Outrageous Adventure!" Directed by Ben Jones.
A fan favorite episode and a favorite of mine as well. This episode Batman is hardly in it and it focused on Aquaman and his family touring across the country in a Winnebago (think "National Lampoon's Vacation" with super heroics).
"Batman: The Brave and the Bold" ™Warner Bros. Animation.