The Wild Thornberrys (1998)

S3E17 Hello, Dolphin!

Setting: Shark Bay, Australia Nigel and Marianne embark on a risky mission to capture footage of tiger sharks, while Eliza enjoys a swim with dolphins. Meanwhile, Debbie faces heartbreak after her online boyfriend, Sven, ends their relationship. As the kids venture out on a boat to swim with the dolphins in the open sea, they find themselves encountering unexpected guests.