Leafy sea dragon

Here is an idea for an animal that lives in the ocean. These colourful creatures are related to the seahorse. They have the ability to camouflage with the seagrass. No other mob will attack it. Which means you don't have to worry about it getting hurt or anything. Also the Least sea dragon even doesn't attack anything even players. Players can feed them seagrasses to tame them. After taking them they will follow you everywhere (in the ocean). Sadly it can't go on land. Actually there is a way to bring it home with you. You can collect them using a bucket of water. Hope you like this idea.