What type of fish eats sea monkeys?

Answer 1

Any fish that can fit them in its mouth basically. They are an excellent food for most fishes and most fish would benefit from having them added to their diet. Except for strictly herbivorous fishes like some algae eaters or very large fish that might not see something that small as a prey item any other fish will grab them up with gusto. In the aquarium trade they are called brine shrimp instead of sea monkeys by the way.

Baby sea monkeys are a very common food for young small fish. You can find them frozen or buy the eggs and hatch them yourself. Raising them to adults in a large volume is rather difficult and not really worth the effort.

You can find frozen or freeze dried adult brine shrimp in most pet stores. Finding live adults has become a rare thing these days, a few decades ago they were fairly common in most better pet stores.