Guardian Undersea Turrets

Please welcome my idea for a new form of underwater defense, Guardian Turrets! Providing only the safest underwater experience for you!

Crafted with Prismarine bricks and a Heart of the Sea, the Guardian Turrets can be placed on the ocean floor. Upon being placed, the Guardian Turrets will target Drowned mobs in a 10 block radius around it and fire the classic guardian laser at the enemy. They may even be able to attack any fish or squids that stray nearby, being helpful for fish and ink farms! However, they wouldn't attack the players who build them. These turrets wouldn't be invincible however, and similar to an Iron Golem would have to be repaired using Prismarine shards. 

I think that this could be a good idea because there currently isn't too much defensive options underwater. On the surface you could plant berries, build walls, or use golems to protect your base from enemies, but underwater bases may not have the same luxury. It could also be used for a number of useful underwater farms!

Thank you very much, and I hope that my idea may be considered!