Short answers, pulled from the story.
Ringo Starr wrote the song Octopus's Garden while George Harrison provided uncredited assistance with chord changes. The basic instrumental track for the song was recorded on the 26th of April 1969 at Abbey Road Studios.
Ringo Starr wrote Octopus's Garden after eating squid on a boat belonging to Peter Sellers in Sardinia during 1968. He wanted to escape mounting hostility among his bandmates and imagined being under the sea like the octopuses described by the boat captain.
Engineers created unique bubbling audio textures using milk straws and guitar amplifiers during the recording sessions. Harrison added the sound of bubbles by blowing through a straw into a glass of milk at Starr's request.
The song received a remix in 2006 for the Beatles album Love. This version integrates elements from other classic tracks including orchestration from Good Night and drum tracks from Lovely Rita.
Jim Henson's Muppets made three video cover versions of the song across Sesame Street Episode 19 in 1969, The Ed Sullivan Show in March 1970, and The Muppet Show Episode 312 in 1978. Kermit the Frog performed alongside Robin the Frog and Miss Piggy in these appearances.