Cryptozoology
Since no one is signed up to moderate I’ll keep things going-
Yesterday I learned of the existence of limbless lizards
But Jason, you say. Isn’t a limbless lizard just a snake?
No, don’t be stupid. This is a lizard:

and this is a snake:

besides our beloved Shork, what other cryptozoological abominations of nature are out there?
Update:
Our winner is nicolecarrbio with:
The cockamouse: this animal lives in urban areas. This animal has made huge leaps in evolution. It is the hybridization of a cockroach and a mouse. There have been reports that this majestic creature has flight capabilities. Caution this animal may be vicious.
I just love How I Met Your Mother.
Your prize is the knowledge that these taxonomic bugbears are out there defying us to study them—in little mayonnaise jars with a stick and a piece of cheese.
hairless cats.
seriously.
terrifying.
The cockamouse: this animal lives in urban areas. This animal has made huge leaps in evolution. It is the hybridization of a cockroach and a mouse. There have been reports that this majestic creature has flight capabilities. Caution this animal may be vicious.