can you be more specific by what you mean by "meaty" food? I hear this being thrown around but never really understood what is meant by it.
In my mind, the red worms (composting worms) feed on 100% organic veggie and fruit diet. I would imagine that these nutrients would then be passed on to the fish as he eats in the worms.
here is what I could find.
Nutritional Analysis of Red Worms:
Moisture- 84.8%
Fat- 2.0%
Ash-0.7%
Protein- 10.5%
The chemical composition of compost worm is suitable for animal feed as the composition of worm tissues consist of 80 – 90% of water and the dry matter basis which are distributed into 60 – 70% of protein, 6 – 11% of fat, 5 – 21% of carbohydrate, and 2 – 3% of minerals with gross energy of 16 – 24 kilo Joule per gram.
The mean amounts of essential amino acids recorded from the composting worm tissue are very adequate for good animal feed if compared with the recommendation of the Food and Agriculture Organization (FAO) of the United Nations, particularly in terms of lysine, methionine, cysteine, phenylalanine and tyrosine. In addition to containing adequate protein content, earthworm tissues contain a preponderance of long-chain fatty acids, many of which the non-ruminant animals cannot synthesize. They have an excellent range of vitamins; are rich in vitamin B3 and provide a good source of vitamin B12.