What movie is this where an underwater creature eats the white oreo filling?

mustbme2003: What movie is this where an underwater creature eats the white oreo filling?
It came out about ten years ago (possibly later). It was about a family whose mother died, and they went on a mini-vacation to a beach with a lighthouse. In one part of the movie, the father decides to “dig to China” and digs a massive hole in the sand. Somehow, the children discover that there is a creature in the water which likes the white filling in oreos, and they eventually find the creature in an underground cave. The creature is sick and I think it eventually dies. Does anyone remember what the name of this movie is?

Answers and Views:

Answer by MystMoonstruck
Magic in the Water (1995)
starring Mark Harmon, Joshua Jackson, Harley Jane Kozak, Sarah Wayne, Ben Cardinal
IMDb synopsis:
Radio psychologist Jack Black takes his children Joshua and Ashley on a ‘vacation’ to a lake in British Columbia. While he grinds away at work the children discover that the famous local lake monster Orky may not be just a gimmick to attract tourists after all. In fact, Orky may enable them to get closer to their workaholic dad, and help stop local polluters who are dumping toxic waste into Orky’s home.
IMDb review excerpt:
A little girl named Ashley is positive that a Loch Ness-type creature lives in the lake. She leaves some Oreo cookies on the edge of the dock. Upon her return, she discovers that the white stuff has been licked out and the rest of the cookie remains, dry as a bone.
TRIVIA:
Early in the movie, Ashley is wearing an oversized powderkeg-blue (UCLA) football jersey #7. Mark Harmon was the starting UCLA Quarterback~wearing #7.

Here’s one site where copies are available:
https://www.amazon.com/s/?url=search-alias%3Daps&field-keywords=B0006D3HCO%7C%200800184580%7C%20B00004CUCB%7C%200800184572%7C%206303965474%7C%20B001EBJ75I%7C%20B000W453OW%7C%20B000008PPT&tag=imdb-adbox
Also, you can watch it at Amazon for a nominal fee.

You also might enjoy “Mee-Shee: The Water Giant” (which prefers salmon) and “Loch Ness” (1996). Then, there’s “The Water Horse”, which I place below the others when it comes to entertainment value.