With the introduction to guardians in Minecraft sea life has been a bit better and more diverse (again just a bit) however I propose an idea to add a small new creature to make sea life just a bit more livelier the Dumbo Octopus! this is a real life creature which I think can spruce up the ocean!
The Dumbo octopus has 1 heart of health and cant be out of the water or it will suffocate
The Dumbo octopus is about the size of a cave spider, less than the size of 1 block
The Dumbo octopus usually spawns in the ocean/river floor
The Dumbo octopus will drop 1-2 pink dye. Furthermore the adorable octopus will lay an egg (1 per 1.5 minecraft days) called a pink egg is dyed pink, which when thrown on land will do nothing and will act as a substitute for a chicken egg in crafting recipes, however right clicking it in water has a chance to spawn an adorable octopus. which means you can put one in your own aquarium!
cool model by alfalfamire!: