Deep Trouble (2) (S04E08)

Billy and his sister, Sheena, are on a trip to see their uncle, Dr. Deep, on a small Caribbean island. It’s an ideal spot for underwater exploration, and Billy is eager to dive into an adventure. However, there’s one important guideline: avoid the coral reefs. Yet, the reefs are so stunning and tranquil that Billy can’t help but be drawn to them. Unbeknownst to him, he’s not the only one in the water. Something sinister and scaly lurks beneath the waves—part human, part fish...