In the opening scene, 7-Zark-7 is descending in the elevator tube and wearing his orange '7' sweater. But after exiting the tube his wearing his yellow 'G-Force' helmet and cape instead.
Skuldoon bows his head to Zoltar when he says "It shall be done, sire". But when the shot changes he is standing up straight and bows his head again.
Princess says that there are 'killer sharks' going after the baby whale. It was actually orca's (aka killer whales).
7-Zark-7 refers to a group of whales as a "herd", but the correct term is "pod".