There is a movie I saw as a kid. It had a young girl in it on vacation with her family. Her mother was pregnant and they used headphones so the baby could hear the dolphins.
The young girl met a dolphin on this island, where they were staying. I think she may have fell into the ocean at one point and this dolphin helped save her.
I think this movie must have been made in the 80s or 90s.
Please help!!