Aquatic animals!

Ever made an aquarium and had a lack of animals? Well, some examples of aquatic animals that would be a great addition to Minecraft are, jellyfish, whales, some types of unique fish, sea urchins, and stingrays! These can make your aquarium more fun and would be cool to come across in your survival worlds. There could also be animals like otters and maybe beavers. Which would also be cool to build habitats for, and/or come across in the wild.