Well since i live in a scarsly populated area surrounded by trees, it it's a guppy i just chuck it as far as i can and te birds do te rest. Bigger fis, i bury.....
OFF TOPIC: Evan, the carribean must really be a paradise! You catch your own aquarium fish, harvest aquarium plants in the nearby river, and is surrounded by lots and lots of trees!!!!
Makes me wanna take a vacation over there 8)
Ok, back to the topic: chuck em in the bin.
Spreading diseases to what?Neither - wrap'em and bin'em them.
Flussing is generally thought not to be a good idea - spreading potential disease and all that.
People go to the bathroom and flush it down the toilet so I doubt that flushing a dead fish would do anything and we don't drink the toliet water so its nothing to worry about.I put them in a plastic bag and put them in the bin. But the only fish I had die on me were some penguin tetras I bought a few weeks back and they all died within two days of whitespot...never had a fish die that I was attached to.
My Mom makes regular trips to St Lucia and St Martin (sp). In fact the whole of the caribbean!

I'm a soppy softie tooWrapped in tissue, then in a match box or equivalent according to size and they get buried in the garden...

Yep.Eat 'em.

Aquatic diseases are already preexisting in open water.