They understand fire gives off a lot of heat and smoke burns their eyes, so yeah I think they get it.

Dolphins understand it better than we do, and they know it’s rather dangerous. That’s why you don’t see fire undersea.

…okay, I’m joking. But serious now: I think some individual animals understand that the bright thing is hot, and if you get too close you’ll get hurt. But that’s from their individual experiences, not something instinctive; otherwise they’d avoid things that look like fire, such as Christmas lamps.

Cats dont care. They’ll actively try to touch it.

I expect it depends on the animal and their historic (as well as personal) exposure to fire.

For example, some Australian raptors understand how fire spreads and how to use it to their advantage pretty well, I’d say! blog.nature.org/…/australian-firehawk-raptors-int…

A 2009 study suggests that chimpanzees understand fairly well how fire spreads and can plan to avoid it www.sciencedaily.com/releases/…/091222105312.htm

Forest animals certainly seem to know they need to flee fire.

But like, do dolphins understand fire? Honestly probably not; how would they have developed this knowledge?