Hi karma and welcome. Fish should be quiet, no mess and no smell but accidents do happen! :lol:
Specific marine questions need to be posted in the marine section as most of those guys don't read the rest of the forums
Sorry to hear that Tsarina. Sometimes this happens no matter what you do. In fish, it is often too late if you can already see the signs of secondary infection (like the fluff). Sometimes they come right and sometimes they don't.
I wonder how good they would be in the long run though if they only last 1 hour. I have always used hot water in a fizz bottle wrapped in newspaper or towel. Works well and keeps the heat for many hours. I have had fish shipped up from Invercargill with a hot bottle in it as described and the container got held up (in snow I think). Fish delivered alive and well 3 days later. They had also been well bagged.
Ours look different - different whitebait in different areas - bit still pretty. Ours are pale cream and bluey/green and catch the light beautifully.
We had 8 of them - all called called Patty. :lol:
My understanding is it is contagious, but not very and usually only if you are overstocked.
I had one fish with dropsy. Never saw it in others and never had another one with it since.
If a fish is bloated the side scales do stick out a bit as the belly swells. If it is dropsy, the scales stick out all over. Look down on it from above and see if it looks like a pinecone - that's dropsy.
Here is a fish with dropsy