If my house was ablaze and a genie gave me the chance to have 2 minutes back inside, guaranteed no death, I'd rescue more sentimental things like old photos, things that can't be replaced. Sorry fish, I love you, but you're replaceable in that situation.
Pretty sure I read about a LFS that had a serious fire back along, and apart from a few tanks which smashed under the heat, most of the fish were still alive.
But photo isn't worth much except sentimental value. Fish / other critters have a high value (at least to the world we live in).
I consider sentimental value to be much higher than material value though. I have no intention of selling my fish, so they're only worth to me what it would cost to replace if I lost them. If my full tank got wiped out it'd probably cost a day's wages or so to replace the fish. If I had to replace the tank and the plants as well, maybe 5 or 6 days' wages. In any case, these are all material goods that I would hope to be able to claim for on the home insurance. I know the individual fish will be dead, but I don't have any fish with any special sentimental value or that look any different to every other fish of their species.
Old photos and stuff are highly sentimental to me and irreplaceable, therefore priceless. Fish, I can throw some money at someone and I can have what I had back in a manner of speaking. The photos, not so.