Canned fish

Common card · No. 306377

Canned or tinned fish are food fish which have been processed, sealed in an airtight container such as a sealed tin can, and subjected to heat. Canning is a method of preserving food, and provides a typical shelf life ranging from one to five years. They are usually opened via a can opener, but sometimes have a pull-tab so that they can be opened by hand. In the past it was common for many cans to have a key that would be turned to peel the lid of the tin off; most predominately sardines, among others. Fish have low acidity levels at which microbes can flourish. From a public safety point of view, foods with low acidity (a pH more than 4.6) need sterilization at high temperatures of 116–130 °C (241–266 °F). Achieving temperatures above the boiling point requires pressurized cooking. After sterilization, the containing can prevents microorganisms from entering and proliferating inside. Other than sterilization, no method is dependable as a preservative. For example, the microorganism Clostridium...

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