Unique breeding-based platypus mob

The platypus! An animal many are requesting to add. My idea is different. The platypus can’t just be any ordinary mob. The Minecraft version like the real animal has to be unique! Instead of a randomly spawning in a certain biome like most Minecraft mobs, it can only spawn if bred by a player by feeding a glow ink sack (yes, you read that right! Since real platypuses can glow under UV light, this mob would have a faint glow at night, and this would also give a fun additional use to the often neglected glow ink sack) to a turtle and a chicken. The platypus is also useful in-game. Similar to a sniffer, the platypus would dig up sand and gravel blocks randomly, with a silk touch feature (so suspicious gravel would stay suspicious) and the platypus would also have a chance of digging up items such as broken music discs or nuggets. Every sand or gravel block they dig up also has a chance of becoming suspicious. And as a fun bonus, the players first time creating a platypus would unlock the achievement: “What have you done?” Feel free to comment any ideas you may have about what this mob could be like or look like, as ideas work best when we think together!