<a href=showthread.php?s=&postid=15372785#post15372785 target=_blank>Originally posted</a> by Paul B
Saltwater fish should eat animals from saltwater but worms even land worms also have the Omega oils that fish need.
I have fed earthworms for years. Anemones love them also.
You need to get oil into fish to keep them healthy and get them spawning. A fish in the sea eats whole fish, not the stuff we normally feed them. A whole fish contains a lot of oil and it is almost all in the liver. If you can't feed whole fish then the next best thing is worms or fish eggs.
I personally feel that if you can't feed whole fish, fish eggs or worms then your fish can not get into excellent condition and they willl be suseptable to paracites or other diseases.
Almost 20% of a wild fishes diet in the sea is oil. Mysis, flakes, nori, clams, squid, angel diet etc do not contain fish oil.
There is a little in whole clams but worms are full of oil as are fish eggs.