This is the first time the PAW Patrol save a whale.
In this episode, when riding the elevator after changing into their uniforms, the pups are not all shown in their usual quarter-left angle, nor are they in the usual order. Instead, they are lined up from left to right: Rocky (quarter-left), Zuma (nearly profile left), Marshall (quarter-left), Rubble (full front), Chase (eighth-right), and Skye (quarter-right).
This is the first time Rocky wears his hat without his uniform or pup pack.
This is the first time where Marshall gets picked for a mission.
Animation Error: After Rubble slips off the slide, if you look closely, Skye's collar, normally light pink, is black.