It depends on the fish, generally they eat insects or aquatic plants.
Fish can be fed fish food or artificially created food. This is different from natural food which is made from natural ingredients.
Penguins are wild animals, but they can care for themselves they have a natural instinct that they know when and how to hunt for food as in Fish and Krill
Normally found around rivers, lakes, bays, where they feed mainly on fish.
Clown fish feed like most regular feed, by mouth.
You just feed it DONE!
Give a man a fish and you feed him for a day. Teach a man to fish and you feed him for a lifetime. -Chinese Proverb
the emperor penguin feed on small fish which feed on krill
No, they feed mainly on smaller fish for example the Neon Tetra. Tuna also feed on plankton when they are young. They do not feed on sea snails, as they cannot get through the shell.
You can feed a small pieces of fish food
Dolphins Feed on small sea creatures like Fish.
Fish food
Chinese proverb - give a man a fish and you will feed him for a day, teach him to fish and you will feed him for a lifetime