Are fish that have fat distributed through the flesh in the muscle fibres -They contain - on average - 10% fat. They are sea fish such as herring, mackerel, sardines and tuna or fresh water fish such as trout.Or both such as salmon that live in the sea but return to the river to mate and lay eggs.

• white fish

• shell fish

• oily fish

Are fish that are round or flat.They have white skin underneath and have dark skin on the top to camouflage. Most white fish are found at the bottom of the sea on the seabed.There only minute traces of fat found in white fish. Some examples of white fish are cod, haddock and whiting.

• Red fish

• Flat fish

• Black fish

• White fish

There are two types of shellfish - Molluscs and Crustacea. Molluscs have a harder outer shell and they have no legs. On the other hand, Crustacea has legs along with a partly jointed outer shell.Examples of molluscs are mussels, oysters, scallops (Squids and octopus are included even though the shells are inside).Examples of crustacea are crabs, lobsters, prawns.

• hard fish

• shell fish

• soft fish

• scaly fish

---- ---- means that the fish may contain bacteria that could cause food poisoning.

Frozen fresh fish are the usual fish we buy.It is frozen to preserve it so that the bacteria are unable to multiply due to the low temperature. The bacteria are dormant at what temperature.

• -10c

• -5c

• -20c

• -18c

Some examples of ------ fish are mackerel and salmon. It is ------to preserve the fish so the bacteria could be destroyed by heat as the can is sealed so that bacteria could not enter.

An example of ------- fish is roll mops (herrings).------- fish is to help preserve it as it provides an unsuitable pH (acidic condition) for bacteria growth.This is because the water is removed from the bacteria by osmosis and is replaced with vinegar.

Bacteria destroyed by heat; can is sealed; bacteria cannot enter. Such as ------ salmon, tuna and sardines.

-------- fish is a way of preserving it as water is removed by osmosis and bacteria needs water to multiply. So, it prevents bacteria from multiplying.

• seeweed

• soaking

• salting

• sailing

------ is a way to preserve fish. When fish is dried, the water is evaporated to prevent the fish from multiplying as water is needed for bacteria to multiply.