Guys, please be careful. Bile can't be washed off because washing spreads it round. Bile is known to contain dangerous bacteria such as Salmonella.
Not all organisms have gall bladders, check out the liver of deer, horses and wallabies. They dont have gall bladders. It may be that some species of fish dont either, but be carefull how you remove the gall bladder so as to avoid spills. Besides, fish cleaned immediately keeps better and tastes better. Trim the liver fast and it too will remain edible longer.
Tight lines, Philip