Harmony Dolphin is children's show conceived to promote a line of bath toys, though for the work put into it even with that basis, it's not poorly regarded; each of the dolphins in the show is based on a collectably colorful and patterned little floating plastic dolphin that plays a different little melody via a waterproofed voice box at the push of a button; the studio takes the designs and works with them (they managed to turn one of the most mundane-looking toys, Stormalong the navy blue dolphin with a gold stripe along each side and a white belly, into one of the most popular ones by characterizing him as a charismatic salty young sailor), and the animation is "fluid", natch. But what nearly anyone includes it in their guilty pleasures for is the music. There is much emphasis on the music. Every named dolphin has their own leitmotif based on their corresponding toy's little jingle and the show is loaded with musical numbers.

In attempt to reduce their need to consider it a "guilty pleasure", a circle of young adult HD fans have banded together under the "brofin" flag, a play on "dolphin" and "brofist" (and of course "fin"), as in to give someone a brofist or rather bro-fin on their admittance to watching the cartoon about dolphins.