The images could look like this:
Shrimp like: Shrimps, for example krill, belong into this category. In most cases you can identify eyes and an elongated body with tail. The head may be missing.
Several species of shrimps belong to this group. Especially abundant, and therefore probably known to most people, are the krill. These shrimps are very abundant in polar regions, but also especially in upwelling regions they occur in large swarms and are actively fished. There are also several other shrimp species that belong to the shrimp-like.