KH1 - Mushrooms In Atlantica?

My husband's playing through KH1 and he's having a real problem finding the "stop" mushrooms in Atlantica. We were told they were in the Calm Depths, and he can't find them anywhere. They're the last type he has to get and he's going absolutely crazy and has spent hours looking for them. Any words of wisdom?

(Ulterior motive - perhaps now I can get the PS2 back? :D)

I think I've seen Mushrooms in the Den of Tides before.

I found them in Linked Worlds, which is an area in the last world. It's next to Final Rest, and it's usually populated with Invisibles and Angel Stars.

it takes a lil time b4 they show up again...took me a while..it helped me when i left the world then came back