The Snail Ballock Parasise

So the snail becomes this machine for reproducing the larvae of this fockand snail, right? But then the larvae of the flatworm gets into a pond, and then the larva infects tadpoles. And when the larva gets into the tadpoles, it causes them to grow extra limbs. Then they become little frogs that have like three legs. Those frogs with three legs, they can't hop around properly. When birds are looking to eat little frogs, they only eat frogs that have three legs cause they're the easiest to catch. That's a symbiotic parasitic relationship in nature. This is what i'm interested in, symbiotic parasitic relationships, and this new