“Tina: What kind of cats are those? Newt: These aren't cats, they're...” – Fantastic Beasts: The Crimes of Grindelwald ... Movie Quotes Database

Tina: What kind of cats are those?
Newt: These aren't cats, they're Matagots. They're spirit familiars. They guard the Ministry. But they won't hurt you unless you…
Leta: Stupefy! [uses the spell on one Matagot causing it to multiply]
Newt: Unless you attack them.
Leta: Oops.

More from Fantastic Beasts: The Crimes of Grindelwald

Newt Scamander It was a mistake in a stupid magazine. My brother's marrying Leta, June 6th. I'm supposed to be best man. Which is sort of mildly hilarious. Newt Scamander Sorry, but I can't admire people whose answer to everything that they fear or misunderstand is "kill it"! Newt Scamander It's an expression derived from the three heads of the Runespoor. The middle one is the visionary. Every Auror in Europe wants Credence dead, except you. You've gone middle head.