Giant Otter (Evolution)

I researched the giant otter. Some facts about the otter are that it likes to eat fish and lives there in the Amazon rainforest. The giant otter already has some flippers and a tail. However, I have some add-ons for it since climate change is becoming a reality sooner than expected, organisms need to evolve. I am giving the giant otter gills to breathe underwater and it can already breathe oxygen so there's nothing to add there. I will also be giving it sensitive whiskers so it can sense the temperature of the water. And stronger tails and flippers so it can swim faster to catch prey and jump out of the water at times as well. I will also be giving it blubber so it can store more energy.