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The Secret of Shark Island is the eighth episode of the first season of The New Scooby-Doo Movies.


While on their honeymoon, Sonny and Cher meet up with the gang at a run down beach resort that is not what they expected. Along with the bad accommodation, there is a giant monster shark lurking around the resort grounds.


Scooby and the gang are driving along the coast when they find Sonny and Cher stranded and decide to give them a ride, all goes awry when they get stranded in a dilapidated hotel that Sony and Cher's travel agent booked for them,

As time goes by they start uncovering the mystery of the Pescado Diabolico, and figure out that not all is as it seems.


Main characters:

Supporting characters:


Other characters:

  • Vultures (single appearance)(no lines)



  • TBA



Suspect Motive/reason
Matilda Suspicious manner.


Culprit Motive/reason
Milo Meekly
Sea scavengers as the shark men
To steal gold treasure.


Don Messick Scooby-Doo
Matt Hildago
Casey Kasem Shaggy Rogers
Frank Welker Fred Jones
Heather North Daphne Blake
Nicole Jaffe Velma Dinkley
Sonny Bono Himself
Cher Herself
John Stephenson Milo Meekly

Full credits

The following credits are how they are seen on-screen (or as close as possible).


  • Sonny and Cher ended their marriage in 1975. Sonny passed away on January 5, 1998 in a skiing accident.

Cultural references

  • The "Avon lady" referenced by Cher is a door-to-door sales person that sells Avon personal care products.
  • The "Jolly Green Giant" (well giantess) referenced by Sonny is the mascot of a frozen and canned vegetable brand owned by General Mills. The mascot made its first television appearance in 1958.
  • Sonny & Cher also refer to Barbra Streisand while in bed, who was a famous musician and actress at the time.
  • While Sonny, Cher, Shaggy & Scooby are running from the Shark God on barrels, Cher tells Sonny, "Well this is a fine mess you have got us into, Sonny!", alluding to Oliver Hardy's famous catchphrase in the Laurel & Hardy films. Incidentally, they would be referenced again in the following episode with Don Knotts, and finally have their own guest spots in the episode after.

Animation mistakes and/or technical glitches

  • Sonny mentions he left behind the spare tire at home to make room for his waterskis, but there's a spare tire on the side of the car, right next to the popped one.
  • On the brochure, the Hideaway Hotel is misspelt "Hideway Hotel".
  • When coming back up for air, Fred says he couldn't hold his breath any longer and Velma agrees, but it comes from Daphne's mouth.
  • A few seconds before Mr. Meekly says to Sonny and Cher, "Want all of your children in the same room", the bell on his desk disappears.

Inconsistencies/continuity errors and/or goofs/oddities

  • They say that "pescado diabólico" means "fish of the Devil," but the Spanish phrase actually translates to "diabolical fish" in English. A more accurate Spanish phrase would be "el pescado del Diablo."
  • Near the end of the episode, when Matilda/Matt Hildago calls the Shark Men out of the water, there are two in the water, and one walking away from Shaggy, Scooby, Sonny, and Cher. There are actually two Shark Men in total, not three.

Home media

  • US.png Hanna-Barbera Personal Favourites: Scooby-Doo VHS released by Worldvision Home Video in 1988.
  • US.png Hanna-Barbera Personal Favourites: Scooby-Doo Laserdisc released by Image Entertainment in 1991.
  • US.png The New Scooby-Doo Movies: The (Almost) Complete Collection DVD set released by Warner Home Video on June 4, 2019.
  • US.png The New Scooby-Doo Movies: The (Almost) Complete Collection Blu-ray set released by Warner Home Video on June 4, 2019.
  • US.png The Best of The New Scooby-Doo Movies: The Lost Episodes DVD released by Warner Home Video on June 4, 2019.


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