Kalkbreath":3px5n1lg said:
The idea that fish dont hide in dead coral is silly as well. They hide in old tires and dead rock every where in the world where live coral is not an option. Fish hide in bleached dead coral in fish stores through out the USA as well , so the idea that bleached items cant sustain life near them is silly.
No one ever said that dead coral heads can't sustain life, Kalk.
Only *you* have ever made that suggestion.
Where you are running into trouble is in your utter lack of understanding of simple coral reef ecology. (I can recommend Sorokin's book, even with the sometimes confusing wording. Russian translations sometimes are difficult...)
The issue is this: If you compare the carrying capacity of two identical reefs, one where the coral cover is approaching 100% (Essentially pristine reef) and one where the coral cover is down to 10% (severely degraded reef), the first thing that you will notice is that, on the pristine reef, there are more fish. I don't mean just a few percentage points, either. I'm talking the difference between drizzle and intense thunderstorm, or a few snowflakes and a blizzard.
People that do this for a living can provide data that shows not just one, not just two, but three orders of magnitude difference.
So, it isn't that a damaged reef doesn't have fish. It does. Sorta. Most of them are low-valued and uninteresting fish from both a marine ornamental perspective and from a food fishing perspective. The number of genera drop, the numbers of species drop, and the number of fish drop.
What is so completely different is when you dive on a great reef and find yourself practically immersed in fish. The difference has to be seen to be appreciated. The biomass of fish increases 100-fold. The numbers of species increase, as well as the number of genera.
Comparing an old-tire 'reef' to the real thing is also quite the interesting choice here. Again, it betrays a lack of understanding. "Tire reefs" were proposed in the 70's, and showed some intial signs of success, but the longer tires are in the water, the more they degrade. Coral recruits will fall off. Fish will tend to congregate wherever there is structure in the water, but it turns out that tires don't provide much real cover. Fish recruitment is pretty poor overall, and the idea of using old tires as reefs was pretty much abandoned when the data over time was analysed.
I really don't understand why it is so hard for you to accept that cyanide kills coral. Given that bleach is a strong oxidizer that attacks organics especially, it should follow plainly that a squirt of bleach onto a layer of tissue only few cells thick would kill off that tissue.
If you feel so strongly that it doesn't, then why not try this little experiment. You can write it up and submit it. Take a boxful of your corals, put them into a tank, squirt each of them with a bottle of bleach, wait ten seconds, then remove them to a tank with clean water. Then write up the mortality rates.
Oh, and you can put fish in the tank too, if you so desire.
Regards.
Mike Kirda