Bloodworms for food are normally not worms but beetle larvae. There really are salt water bloodworms that we use for bait and they would be great, but pretty big so for most fish, they would have to be cut up. Lionfish and moray eels would be able to handle them as would anemones.
Earthworms are also great. I am not sure if it is the actual worms that is very healthy or the dirt and bacteria in their gut.
Like I mentioned, the lack of gut "dirt" with it's associated bacteria is the reason we have a disease forum. Fish are perfectly able to ward off any disease if they are fed correctly and by fed correctly I am not only talking about nutrition wise. But bacteria.
Most people just don't get it and insist on feeding their fish clean, sterile foods like we would eat. But most of us are not fish.
Earthworms are also great. I am not sure if it is the actual worms that is very healthy or the dirt and bacteria in their gut.
Like I mentioned, the lack of gut "dirt" with it's associated bacteria is the reason we have a disease forum. Fish are perfectly able to ward off any disease if they are fed correctly and by fed correctly I am not only talking about nutrition wise. But bacteria.
Most people just don't get it and insist on feeding their fish clean, sterile foods like we would eat. But most of us are not fish.