Dot and the Whale 1986 one on netflix

Dot and her Dolphin friends are playing along the shore one day. Soon they come across a very sad Whale named Tonga, who has washed up onto the beach. Tonga is in danger of being harmed by evil Whale-hunters and a cruel fish shop owner! Seeing that her new friend is in trouble, Dot just might have a few clever ideas to go about helping.