Pet experts: 'Nemo' sales rise with movie release

UNDATED (NBC) -- Pet experts are expecting another run on certain type pets all because of the re-release of a movie that starts today.

It’s been nearly ten years since Finding Nemo created a sensation at theaters and pet stores.

After the movie debuted in 2003, demand for real "Nemos" took off.

"People wanting Clownfish, not necessarily knowing that it's marine life or saltwater fish,” said Don Spaeth, an Aquatic Life Expert.

The costs of caring for saltwater fish is higher, which is the type of information aquatic life experts like Don Spaeth will be doling out with the release this weekend of "Finding Nemo in 3D".

For example, the stuff put in water to make it safe for us to drink is not so good for fish.

"You can use your regular tap water but you're going to need to add products like a de-chlorinator that's going to take chlorides and chlorinates out of the water to make that water safe for the fish to live in," said Spaeth.

Overfeeding fish also results in unsafe water because un-eaten food drops to the bottom and reduce water quality.

He said be warned, it's no easier to tell a child about the passing of a fish than for, say, a puppy.

But Spaeth also added, "A fish by any means takes a lot less time than taking the puppy out to walk and to feed.”

A point that takes the bait for first-time pet owners - like small children.