Has in Portugal, moreover in the Atlantic, the sardine is an important fish in the Pacific. But not only for people. It is an important food for other marine animals, as birds and mammals. There is not enough information why, but the sardine stock seems to be declining in the California coast. As it happens to other top predators as tuna, that have been intensively harvested, the sardine fishery can also have irremediable consequences for the marine ecosystem. Sardine is in a low level of the marine trophic web but they have an important role for other predators. If we fish too much, there is less sardine to feed other animals and it is more difficult to recover. If we look back, we can learn from the past. Without fish, there is no fishery, no food...and in the end no sea life. The decline has prompted steep cuts in the amount fishermen are allowed to catch, and scientists say the effects are probably radiating throughout the ecosystem, starving brown pelicans, sea lions and...