Raw Fish

Raw fish is a food item which is obtained by fishing. One raw fish restores. When placed in a furnace, it produces cooked fish, which restores. It can be fed to ocelots to tame them. Raw fish have a cyan coloured body and a lighter shade of blue for the fins and tail.

Fishing
The most common way of obtaining raw fish, like any other fish, is fishing. The chance of one being caught can be increased with the 'Lure' enchantment.

Guardians
Another method of obtaining them is through defeating Guardians. This method can be very efficient if a Guardian farm is built. There is also a 1.5% chance from getting it as a rare drop, however this chance is trivial.

Trivia

 * In the Halloween Update, Notch said he would add fish as a sea creature; however, he had limited time, and was thus only able to add them as an item.
 * Raw fish most closely resembles white crappie or tilapia. However, the texture files and language text label them as cod.