Carps and Koi (-carps) in Minecraft (new fish types)

My Idea for the mobs and items : Carps can be found in rivers and lakes in every biome, no matter how big they are. Both foms have got  6 hearts and are 0.7 blocks thick and 1.3 blocks long. They can be tamed with seagrass (also tall seagrass). By doing this, they evolve into kois. They can be fed with all types of seagrass and kelp ( also dried one). Both variants make the same sounds as salmon when being damaged or killed. carps can spawn in groups from 2-5 mobs at a light level of 5 or higher . They behave passive, meaning they won't attack you, no matter what you do. Kois can be bred by feeding them ( just like pet wolves), every pattern has a 1 in 30 chance to spawn, the others are randomized ( just like tropical fish). You can pick up both mobs in a bucket. The drops for both are: Main drops : 1 raw carp ( with an 100% chance) Additional drops: 1 bone/1 bonemeal (with an 10% chance) 1 seagrass ( with an 8% chance) You can cook raw carp, but not the koi ones ( who would even want eat them ? ) The raw carp item can also be obtained using a fishing rod.