|“||But I promised I'll be back. Arf arf! And I'll always keep my promises!||„|
|~ Sidney, happy with Snowbert being back.|
Sidney the Seal is a purple friendly seal. He is friends with Snowbert, alongside his long-lost friend Hercule Mustache.
Sidney is a purple harp seal. He is small and is very cheerful. He has light purple spots. Sidney also has four whiskers on his indigo nose.
Sidney is a very friendly seal. He has a friend named Snowbert and even Hercule Mustache. He is also very good at giving Snowbert advice in playing dominos. Much like Snowbert, he dislikes Hercule Mustache who always groans and moans.
- The Story of Snowbert the Polar Bear (first appearance)
- The Story of Hercule Mustache
- The Story of Snowbert's New Friend
- Sidney has only appeared once in Adobe Flash animation.
- The only time Sidney has appeared with Lucy was in Episode 62.
- Sidney is usually friends with Snowbert. In real-life, a polar bear hunts for seals and walruses.
- Sidney is the only animal that is seen standing by using his tail.
- Sidney has a friend named Hercule Mustache in Episode 30.
- He is the first character that is a pinniped. The second is Hercule Mustache.
- As stated above, Sidney is based on a harp seal.