Octopuses appear on various The Backyardigans merchandise, despite never being shown in the series itself. They appear in books, on promotional art, and on a Backyardigans shirt sold by Koba Entertainment.
The octopuses have not appeared in any episodes of The Backyardigans, but they can be seen in the Deep-Sea Countdown book and on promotional art for Sea Deep in Adventure. An octopus is also included as part of Bobblin' Figure Packs Series 1.