Put all the ingredients, except the shrimps and clams into the paella and add one cup of roundgrained rice per person. Add saffran. When you have bad quality saffran or your just can't afford it, use 'colorante alementario' to get your paella yellow. Fry for about one minute and pour the sieved fish broth onto the rest of the ingredients. Use roughly two cups of broth for one cup of rice.