I think it’s just normal leech lol, i only know this when someone shared it on r/aquarium or something, can’t remember. They occasionally take it out to feed them their own blood.
Yikes, sounds like some toyol thing lol.
(To be fair, I grow carnivorous plants, and often feed them mosquitoes that have just fed on my own blood)
Lol, can feed them fly what haha, later they only eat mosquitoes with your blood 🙈