The bacteria can contribute to the deterioration of the fish. So wash the bag thoroughly after you finish cleaning the fish. Ice Essential Ice is always the best answer, so if you want to be serious about looking after your catch then you need a storage system which can cope with your regular catch. This brings us to the problems anglers have to contend with in their fish storage. The first is the actual storage system and the second is the amount of ice needed.
Boats have limited space and the smaller the boat the more limited the space.
The best solution seems to be custom made seats, insulated in such a way that they form a big ice box. Commercial coolers are generally too small for bluewater work, although it depends a lot on what size of fish you catch. One of the best coolers currently on the market is the 'Coleman 100' which is big enough to handle fish up to 10 kg and even larger if the fish has a compressed shape. Outside the bluewater scene a 50 litre esky is plenty for most situations. If you have the room for a permanent or semi-permanent ice box, the Bailey range from Queensland have hard exterior boxes which are exceptionally fish keepers, in sizes to suit any boat.