-- "It's not the strangest thing we've ever done."
"Yeah, that doesn't make me feel better."
So now we know that Jedi can survive and operate in the vacuum of space... unless Kanan and Ezra wear special "pressure clothes" just in case they need to space walk, but I'm going to go with the being functional in a vacuum. We kind of already knew that from an episode of Clone Wars, but, Plo Koon (at least, I think it was him, and I'm not looking back to verify) seemed to imply that was a very limited ability. All of that, or there was some kind of atmosphere around the asteroid they were on providing enough pressure to allow them to function without a suit? But not breathe. The breathing was definitely an issue.
Anyway... Space whales! This isn't the first time we've encountered giant creatures living out in the vacuum of space in Star Wars. Or even the second. The first, of course, being in The Empire Strikes Back and the giant space slug that wanted to eat the Falcon. Not to mention the mynocks.
This episode, the Ghost runs out of fuel. I have to wonder if this is where idiot Rian Johnson got the idea for an entire fleet of ships to all run out of fuel at the same time. Probably not. Anyway, as I said before, I don't have a problem with the fuel idea; it's that ALL OF THE SHIPS ran out of gas AT THE SAME TIME! This was much better. Just one ship running on fumes, not the whole fleet.
And what do rebels do when they're running low on fuel? Steal it from the Empire, of course.
"Sounds like a dangerous plan."
"Don't worry, buddy, you're staying here."
"Sounds like a good plan."
"There's no explosion. Why's there no explosion?"
"Next time we just plan on the plan changing."