(The answer to mine was Cat.)
(also, daddy long legs are actually related to mites and are not in the family arachnid, though they are under the genus araneae (if I got the two mixed up excuse me) another common myth is that they are the most toxic "spider", but they have no toxin or fangs at all. They have pincers used for grasping food. The true "most toxic spider" is the Brazilian Wandering Spider)
My guess is the firefox/red panda
This creature's spanish name is based off the fact that it is commonly used for testing VACcines. (Edit: I got that mixed up, it's the other way around)
It is very large
Although usually an outdoor animal, there is someone who keeps hers in her library, and another who thinks it's a dog and lives inside its owner's house.