Anchovies are a large group of fish that have a variety of looks, but are normally thin. Their heads make up half of their bodies, with their eyes being at the very top of their heads. They mainly speak in "meep"s.
They appear in Bikini Bottom often as citizens, but appear in the episodes "Help Wanted," "The Play's the Thing," and "Accidents Will Happen" in large, ravenous groups that will stop at nothing. They are known to attack if not pleased. They are often background characters, but in some episodes they have more major roles.
The language of anchovies is very unique. They usually only say "meep," except for the episode "I'm Your Biggest Fanatic," where they are able to say a few other things. Some anchovies are able to talk normally, however. For example, Mable and her husband Lenny are anchovies who are able to speak normally instead of only saying "meep."