Most penguins eat one, some or all of the following - fish, crustaceans (usually krill) and/or cephalopods (usually squid &/or cuttlefish). Which or all? Well, that depends on which penguin species you refer to. Below is a list of penquin species (including pictures with the species' name below each picture. For more info go to:
Http (colon) (double slash) www (dot)penguins (dot) cl (slash) index (dot) htm
Adelie penguins (Pygoscelis adeliae)
African penguins (Spheniscus demersus)
Chinstrap penguins (Pygoscelis antarctica)
Emperor penguins (Aptenodytes forsteri)
Erect-crested penguins (Eudyptes sclateri)
Fiordland penguins (Eudyptes pachyrhynchus)
Galapagos penguins (Spheniscus mendiculus)
Gentoo penguins (Pygoscelis papua)
Humboldt penguins (Spheniscus humboldti)
King penguins (Aptenodytes patagonicus )
Little (Blue or Fairy) penguins (Eudyptula minor)
Macaroni penguins (Eudyptes chrysolophus)
Magellanic penguins (Spheniscus magellanicus)
Rockhopper penguins (Eudyptes chrysocome)
Royal penguins (Eudyptes schlegeli)
Snares penguins (Eudyptes robustus)
Yellow-eyed penguins (Megadyptes antipodes)
Http (colon) (double slash) www (dot)penguins (dot) cl (slash) index (dot) htm
Adelie penguins (Pygoscelis adeliae)
African penguins (Spheniscus demersus)
Chinstrap penguins (Pygoscelis antarctica)
Emperor penguins (Aptenodytes forsteri)
Erect-crested penguins (Eudyptes sclateri)
Fiordland penguins (Eudyptes pachyrhynchus)
Galapagos penguins (Spheniscus mendiculus)
Gentoo penguins (Pygoscelis papua)
Humboldt penguins (Spheniscus humboldti)
King penguins (Aptenodytes patagonicus )
Little (Blue or Fairy) penguins (Eudyptula minor)
Macaroni penguins (Eudyptes chrysolophus)
Magellanic penguins (Spheniscus magellanicus)
Rockhopper penguins (Eudyptes chrysocome)
Royal penguins (Eudyptes schlegeli)
Snares penguins (Eudyptes robustus)
Yellow-eyed penguins (Megadyptes antipodes)