Amazon River Dolphin

My creature is an amazon river dolphin.In 2023 river dolphins will be almost extinct animals. They have a lot of blubber. Most of their tails are flat or heart shaped. They have fins on their back. The fins on their back can be sharp and skinny or big and round. Their diet consists of 40 species of fish, shrimps, crabs and turtles. In my picture 3000 river dolphins are thicker and have developed to swim in cold water because of climate change. The flat and heart shaped tail has gotten sharper and better for hunting, this includes the fins on their back. They also would have an extra fin on their lower back and a longer tail for better swimming. Their diet consists of 20 species of fish and shrimp. That is my representation of the river dolphin in 2023 vs. 3000.