Treasure fish

If proper fishing with a fishing rod (for the actual fish mobs) is ever implemented into the game, then the only problem there would be is how would you be able to fish for treasure or junk items. That's why I propose adding the treasure fish. It would have golden coloured scaly skin. When this fish is killed or caught with a fishing rod it drops either a junk item or a treasure item. The rarest item it can drop is itself as an item. This gives the much needed fictional impression that this fish is the thing that gobbled up these items instead of having them just be in the water. It spawns slightly more rarely than other fish and doesn't spawn in groups. If attacked it will dash away 10 blocks every 10 seconds, so if it's chased it has to be killed quickly.

• If ate raw it gives 10 seconds of water-breathing and 10 seconds of underwater speed boost.
• If ate cooked it will give 20 seconds of each instead.
• If brewed it makes a potion of dashing which gives you it's same ability and cool-down. It also allows you to dash out of the water into the air.
• If fed to a polar bear it will

This mob is both aesthetically pleasing as well as functional and it gives a use to the polar bear.