Boy, you sure are right about how fast a fire can spread. It's amazing. 30 years ago I put out a neighbor's kitchen fire. I heard screaming, looked out the window, and saw the neighbor lady standing on the porch, maybe 100 ft away. I started running over and she screamed, "my stove's on fire. I had an extinguisher in the car, so I grabbed that, but by the time I got to the kitchen all the cabinets were burning on two walls and smoke so thick I could hardly see. If we had to wait for a fire truck, the house would have been long gone. Weird thing was, I had just stopped by home for a minute to change pants.
I don't know about fish, but those articles say the pet masks are used on all kinds of pets.