The Aquaphbian submarine is a model of a Convair F-102 Delta Dagger slightly re-dressed.
This is the first appearance, in production order, of Oink voiced by David Graham. He later appears in Treasure Down Below (1965), The Golden Sea (1965), Loch Ness Monster (1964) and The Invaders (1965).
This episode was the 3rd episode produced and the 33rd broadcast.