You need to be careful with fish as it may contain microbes that can cause food poisoning.  The following tips will help:- 

• You should always store fish in the fridge but to avoid cross-contamination store fish away from other foods like salads, fruit, cooked meats etc. 
• Fish should be stored on the bottom shelf of the fridge so it doesn't drip on other foods. 
• Keep fish covered when storing. 
• When you have handled raw fish you should wash hands, equipment and work surfaces before any contact with other food.
• Pregnant women, children or the elderly should not eat raw fish or shellfish.