So this was a weird choice for me because leeches and things like it totally wig me out and I hate them but this idea wouldn't go away. So here is a leech axolotl, they are a bit more adapted than most axolotl dragons and developed a long tube like tongue for sucking blood, then their tail becomes bloated with blood the more they drink. Neat huh. They swim around in murky waters and latches onto unsuspecting animals.

This adopt is $6
First in the comments to claim them gets them