These include krill, crab larvae, jellyfish, sardines, anchovies, mackerels, small tunas, and squid. The species are mostly pelagic&colon; sardines, anchovies and jack mackerel. Vietnamese fish sauces are made with anchovies, mackerel, scabbard fish and salt. The former is served plain or topped with onions, artichokes, sausage, cheese or young anchovies. It is produced by algae and accumulates in shellfish, sardines, and anchovies. Worcestershire sauce contains fermented anchovies among other ingredients. An authentic recipe often calls for herbs, onion, tomato sauce, strong cheese and anchovies. Worcestershire sauce is a savory sauce based upon fermented anchovies and other ingredients. In Naples this is tomato, anchovies and buffalo mozzarella. Ingredients such as stockfish or simple marinated anchovies are found here as well. Typical ocean forage fish are small, filter-feeding fish such as herring, anchovies and menhaden. In the Black Sea, their diet contains sprats, anchovies, and pipefish. Examples include whitebait of all sorts, anchovies, and smelt. Small dried anchovies, known as "ikan bilis", are very popular. Only two ingredients were more widely disliked in the survey, anchovies and eggplant.