Aspiring musician and star of 26 cartoons aired as part of The Atom Ant/Secret Squirrel Show (1965-1966). Voiced by Paul Frees, Squiddly was an octopus-shaped, six-legged squid who played bongos, guitar, and sax. Many of his cartoons focused on his attempts to parlay his musical talent into stardom, but he is stymied by fate. Yes, the plot was pretty much I Love Lucy with more legs, though not as many as one might expect, given that squids usually have 10. (Hey, maybe Squiddly and Squidward are related, seeing as how they're both rocking six limbs.)
In 1966, Hanna-Barbera released Squiddly Diddly's Surfin' Safari, a surf-themed kids album that actually didn't include songs sung by the good Mr. Diddly.