In the poll 25% says that they not feed with a variety of food - but in the post it looks like most of you serve at least 3 meals of fin dinner a day. And much of it.
However - even if I can understand the analogy with the food at Alcatraz - is that analogy a good one for the health of our reef fishes? I would answer - no
A living reef is one of the most competitive ecosystems that exist. This has led to a huge specialization among the organisms that live there. This has led to a highly specialized food intake in many fish species on the reef. It can rightly be said that most fish species exert "Alcatraz" style of eating. The variation is not IMO "cross" specific - more "intra" specific - according to what they eat. Fishes specialized at zooplankton eat different species of zooplankton, Fish specialized on microalgae (and the invertebrate life in the algae cover) eat different species among the microalgae, Fish specialized in organisms in the sand eat different organism and organic detritus that you can find there. And so on.
One important fact is also that most fish species eat the whole target organism, including things that the digestive tract cant melt. Further on - the food consist mostly of more than 80 % water - the nutrient content of the prey is "diluted" in water.
IMO - the variety in reef fishes food are among the type of prey they eat - not among different prey types. Fish living on plankton may have a variation of prey that follow the year. Sometimes is some plankton species common, sometimes other and often depended on season.
If you feed with dry food - its about 5 - 7 times more concentrated than their natural prey and its processed. 1 g dry food corresponds to 5 - 7 g of their natural food.
When I started my present aquarium (around 6 years ago) I decide not to use dry food at all. Only fresh frozen food and food produced in the aquarium (pods, microalgae, algae, bacteria, organic detritus and so on) The main food I use is frozen adult artemia and freshwater cyclops. Sometimes Mysis too.
There is - IMO - a myth that frozen adult artemia is poor in nutrition. IMO - frozen adult artemia content as much nutrition as other marine invertebrates. They are normally harvest with their guts full of microalgae. The myth is - IMO - based on the fact that newly hatched artemia loose most of their nutrient content when the egg sac is consumed and need to be feed in order to rise the nutrient content. But it is a different matter compared to feeding with adult brine shrimp which has a stomach full of algae.
My present feeding regime have also lead to a rather slow, natural growth of my fishes.
However - most of the fishes I have need to have food more or less constantly - therefore have I set up a stirrer, bottle and dosing pump. My dosing pump run backwards early in the morning and fill upp the bottle with 400 ml tank water. In the morning I put in 4 cubes of freshwater cyclops and 2 cubes adult Artemia. The dose pump dose 40 ml of this solution 10 time during the day. Yest - there will be bacteria in the bottle - but i see them as food too. During late evening - the dose pump fill up the bottle and empty it 2 times. I have a lot of filtrating animals in the tank - including Clams, sponges and sea squirts.
Sincerely Lasse